20 Best Countersink Bit For Wood [2022]

Are you looking for the best countersink bit for wood? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling countersink bit for wood.

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# Preview Product
1 Amana Tool - (55227) Carbide Tipped 82° Countersink with Adjustable Depth Stop & No-Thrust Ball... Amana Tool - (55227) Carbide Tipped 82° Countersink with Adjustable Depth Stop & No-Thrust Ball...
2 Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink... Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute...
3 IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791) IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791)
4 Countersink Drill Bit Set (8 Piece Set - Carpenters Quality) Counter Sinker Set for Woodworking and... Countersink Drill Bit Set (8 Piece Set - Carpenters Quality) Counter Sinker Set for Woodworking...
5 MulWark 82° Countersink Drill Bit Set incl. 5pcs Free Replaceable HSS Drill Bits for Wood|3/8'... MulWark 82° Countersink Drill Bit Set incl. 5pcs Free Replaceable HSS Drill Bits for Wood|3/8"...
6 COMOWARE Countersink Drill Bits Set- 7Pcs Counter Sink Bit for Wood High Speed Steel, Woodworking... COMOWARE Countersink Drill Bits Set- 7Pcs Counter Sink Bit for Wood High Speed Steel, Woodworking...
7 Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink... Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute...
8 DEWALT Countersink Drill Bit Set #6, #8, #10, 3-Piece (DW2535) DEWALT Countersink Drill Bit Set #6, #8, #10, 3-Piece (DW2535)
9 FTG USA Countersink Drill Bit Set 6 Pc #6 (9/64') Wood Countersink Drill Bit Pro Pack Countersink... FTG USA Countersink Drill Bit Set 6 Pc #6 (9/64") Wood Countersink Drill Bit Pro Pack Countersink...
10 FTG USA Wood Countersink Drill Bit Set 5 Pc Countersink Drill Bit #4, 6, 8, 10, 12, Tapered Drill... FTG USA Wood Countersink Drill Bit Set 5 Pc Countersink Drill Bit #4, 6, 8, 10, 12, Tapered Drill...
11 23 Pack Woodworking Chamfer Drilling Tool, 6pcs Countersink Drill Bit, 7pcs Three Pointed... 23 Pack Woodworking Chamfer Drilling Tool, 6pcs Countersink Drill Bit, 7pcs Three Pointed...
12 LAMPTOP 26-Pack Woodworking Chamfer Drilling Tools Including 6 Countersink Drill Bits, 7 Three... LAMPTOP 26-Pack Woodworking Chamfer Drilling Tools Including 6 Countersink Drill Bits, 7 Three...
13 Amana Tool - (55293) Carbide Tipped 82° Countersink with Adjustable Low Friction Depth Stop, 3/8... Amana Tool - (55293) Carbide Tipped 82° Countersink with Adjustable Low Friction Depth Stop, 3/8...
14 Rocaris 34-Pack Woodworking Chamfer Drilling Tool, 6Pcs Countersink Drill Bits, 7Pcs Countersink... Rocaris 34-Pack Woodworking Chamfer Drilling Tool, 6Pcs Countersink Drill Bits, 7Pcs Countersink...
15 QWORK Countersink Drill Bits Center Punch Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink 90... QWORK Countersink Drill Bits Center Punch Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink 90...
16 FTG USA Wood Countersink Drill Bit Set 6 Sizes Set Countersink HSS M2 Tapered Drill Bits, Quick... FTG USA Wood Countersink Drill Bit Set 6 Sizes Set Countersink HSS M2 Tapered Drill Bits, Quick...
17 amoolo 10-Pack Countersink Drill Bit Set with 1 Free Hex Key Wrench, 7 Pcs High Carbon Steel... amoolo 10-Pack Countersink Drill Bit Set with 1 Free Hex Key Wrench, 7 Pcs High Carbon Steel...
18 Snappy Tools Quick-Change 5-Pc. Countersink Drill Bit Set. Proudly Made in the USA. Snappy Tools Quick-Change 5-Pc. Countersink Drill Bit Set. Proudly Made in the USA.
19 BOSCH SP515 4 Piece Hex Shank Countersink Drill Bit Set with #6, 8, 10, and #12 BOSCH SP515 4 Piece Hex Shank Countersink Drill Bit Set with #6, 8, 10, and #12
20 Countersink Drill Bit Set Wood Hole Drill Bit Timber Wood Working Drill Bits for Wood Screw Cutter... Countersink Drill Bit Set Wood Hole Drill Bit Timber Wood Working Drill Bits for Wood Screw...
SaleBestseller No. 1
Amana Tool - (55227) Carbide Tipped 82° Countersink with Adjustable Depth Stop & No-Thrust Ball...
  • Package Weight : 2.0 Lbs
  • Package Quantity : 1
  • Product Type : Tools
  • Country Of Origin : Israel
Bestseller No. 2
Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink...
  • ✔ Special Reminding - ● These flute countersink drill bit set are machined from high speed steels and are available in 6 different diameter sizes....
  • ✔ Eliminates Chatter&Vibration - All have a 90° angle on the point for sharp and precise countersinking. The cutting edge is hardened and honed for...
  • ✔ Mutiple Application - Ideal for wooden planks,fiberboard,particle board,plywood,plastic,alumiumn board ,pcb board and more
  • ✔ Premium Design - Great for Sinking 90 Degree Holes into Wood and Soft Metals Countersunk Screws and Fixings.Suitable for DIY, Home and General...
  • ✔ Sweet Tips - 1/4″ hex shank countersinks are fine for a quick drill. They don’t slip in drill chucks. You can make deep countersinks easily by...
SaleBestseller No. 3
IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791)
  • Made from industrial grade High-Speed Steel for increased durability. Black oxide finish adds corrosion resistance.
  • Five-flute design reduces vibration for smoother drilling and extended bit life.
  • Precision-ground 82-degree tip drills countersink holes into most machinable metals, as well as wood and plastic.
  • 1/4-inch round shank fits all handheld and stationary drills.
Bestseller No. 4
Countersink Drill Bit Set (8 Piece Set - Carpenters Quality) Counter Sinker Set for Woodworking and...
  • 8 PACK OF COUNTERSINK DRILL BITS - In the Following Sizes: 5/64 - #4, 3/32 - #6, 9/64 - #6, 7/64 - #8, 1/8 - #10, 9/64 - #10, 9/64 - #12
  • CARPENTER GRADE PRECISION GROUNDED 82 DEGREE TIPS - Our Counter Sinker Bits Consist of 4 Incredibly Sharp Blades That Cut Into The Hardest Woods with...
  • ADJUSTABLE LENGTH - Easily Adjust the Overall Length of the Bit with 2 Allen Head (Hex) Screws. Hex Key Allen Wrench is Included With Every Purchase
  • STORAGE CASE INCLUDED - Keeps Your Countersink Bits Organized and Safe in a Hard Shell Plastic Case
  • LIFETIME GUARANTEE - Here at Owl Tools (USA Based Company) we only care about your satisfaction. We try our best to ensure each product is in perfect...
Bestseller No. 5
MulWark 82° Countersink Drill Bit Set incl. 5pcs Free Replaceable HSS Drill Bits for Wood|3/8"...
  • HIGH DURABILITY - This countersink drill bit set is proudly made of classic High Speed Steel with excellent hardness of HRC 62-64; it offers superior...
  • TRUE 82° ANGLE: These pilot screw countersinks bits are designed to match the most commonly used woodworking 82° screws you might encounter in the...
  • SELF-CLEARING: Drill bits are precisely fit into the countersink sleeves and the two chamfered flutes enable faster operation and self-clearing...
  • PERFECT YOUR CARPENTRY - The 2 in 1 design turns two-step countersinking into one-step operation. This can make perfect countersink holes for both...
  • VERSATILE USE: Comes with 5 pieces of replaceable drill bits as a bonus and covers the full range of screw sizes. The countersink bits are ideal for...
SaleBestseller No. 6
COMOWARE Countersink Drill Bits Set- 7Pcs Counter Sink Bit for Wood High Speed Steel, Woodworking...
  • CAPABILITY & DURABILITY: Classic Carbon Steel Material. High hardness, offer superior cutting power and durable.
  • THREE-POINTED DESIGN:Quickly and accurately drill a smooth hole.Better in CENTERING and NO SKID . Five-edged chamfer design will fast discharge chips...
  • REMOVABLE & ADJUSTABLE: Easy to use the combination of Hex Key to adjust or disassemble the countersink drill bit and the five-flutes chamfering.
  • MULTIPURPOSE: Suitable for bench drill, hand drill and conventional electric drill. Perfect for wood, fiberboard, particleboard, plywood, plastic,...
  • SATISFY ALL YOU DEMAND: Set include 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm and 1 free Hex Key Wrench.If you have any problem, please feel free to contact...
Bestseller No. 7
Countersink Drill Bit, Baban Countersink Drill Bit Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink...
  • Special Reminding - ● These flute countersink drill bit set are machined from high speed steels and are available in 6 different diameter sizes....
  • Mutiple Application - Ideal for wooden planks,fiberboard,particle board,plywood,plastic,alumiumn board ,pcb board and more ✔ Premium Design - Great...
  • Mutiple Application - Ideal for wooden planks,fiberboard,particle board,plywood,plastic,alumiumn board ,pcb board and more
  • Sweet Tips - 1/4″ hex shank countersinks are fine for a quick drill. They don’t slip in drill chucks. You can make deep countersinks easily by...
Bestseller No. 8
DEWALT Countersink Drill Bit Set #6, #8, #10, 3-Piece (DW2535)
  • The product is 3PC Countersink Set
  • Easy and simple use kit
  • The product is manufactured in China
  • Drill, countersink and counterbore in one step
  • Four cutter countersink and tapered drill bit provide superior speed and ideal finish
Bestseller No. 9
FTG USA Countersink Drill Bit Set 6 Pc #6 (9/64") Wood Countersink Drill Bit Pro Pack Countersink...
  • Countersink drill bit set for wood with tapered drill bit, 4 Flute countersink cutter #45 Carbon Steel, tapered countersink set features 6 Piece Pro...
  • Wood drill bit set with counter bore chamfer angle 82 degree, smooth countersinking in hard and soft wood, tapered holes for screws. Adjustable...
  • Tapered drill bits pointed tip and wide flute for drilling fast, clean pilot hole, ensures tight fit for screws. Countersink hex drill bit set with...
  • THIRD-PARTY TESTED by US Accredited Lab - HSS M2 Grade 6542 countersink drill bit for wood with tapered drill bits. Wood countersink bit with wider...
  • STORAGE CONTAINERS for this set available below on this page at section " Make it a bundle". Counter sinker drill bit set designed in New Jersey by...
SaleBestseller No. 10
FTG USA Wood Countersink Drill Bit Set 5 Pc Countersink Drill Bit #4, 6, 8, 10, 12, Tapered Drill...
  • Countersink drill bit set for wood with tapered drill bit 3rd Party Tested HSS M2, 4 Flute countersink cutter #45 Carbon Steel tapered countersink set...
  • Wood drill bit set with counter bore chamfer angle 82 degree, smooth countersinking in hard and soft wood, tapered holes for screws. Adjustable...
  • Tapered drill bits pointed tip and wide flute for drilling fast, clean pilot hole, ensures tight fit for screws. Countersink hex drill bit set with...
  • THIRD-PARTY TESTED by US Accredited Lab - HSS M2 Grade 6542 countersink drill bit for wood with tapered drill bits. Wood countersink bit with wider...
  • STORAGE CONTAINERS for this set available below on this page at section " Make it a bundle". Counter sinker drill bit set designed in New Jersey by...
Bestseller No. 11
23 Pack Woodworking Chamfer Drilling Tool, 6pcs Countersink Drill Bit, 7pcs Three Pointed...
  • 【Professional Woodworking Set】- Woodworking chamfering drill set includes 6pcs 1/4" hexagonal shank HSS 5-edge 90 degree countersunk bit, 7pcs...
  • 【Three Pointed Countersunk Drill Bit】- It's made of high-speed steel, with good wear resistance and durability, including 3mm, 4mm, 5mm, 6mm, 7mm,...
  • 【Wood Plug Cutter】- 3/8" shank wood plug cutter bit set is made of durable carbon steel, used for tapered 1/4", 3/8", 1/2", 5/8" wood plugs to...
  • 【Countersink Drill Bit】- It is made of high-speed steel with good wear resistance and durability. There are 6 different diameter sizes 1/4" (6mm),...
  • 【Multiple Application】- This is a complete set of woodworking tools, which can be used for wood, particle board, fiberboard, logs, plastic boards,...
SaleBestseller No. 12
LAMPTOP 26-Pack Woodworking Chamfer Drilling Tools Including 6 Countersink Drill Bits, 7 Three...
  • [A variety of drill bits]: 5 different drills, which can meet all your daily needs
  • [Ultra-high strength]: easily perforate wood, metal, plastic and other materials
  • [Multiple sizes]: Each drill has multiple sizes to meet your different needs for sizes
  • [Common Interface]: The product interface size is suitable for most household Cordless Drills
  • [With auxiliary tools]: Allows you to change the drill bit at any time, and makes it easier for you to drill
SaleBestseller No. 13
Amana Tool - (55293) Carbide Tipped 82° Countersink with Adjustable Low Friction Depth Stop, 3/8...
  • (A°) angle: 49°
  • (B) Cutting height: 9mm
  • (D) Diameter: 3/8
  • (D) shank: 1/4
  • Overall length (L): 2-3/8
SaleBestseller No. 14
Rocaris 34-Pack Woodworking Chamfer Drilling Tool, 6Pcs Countersink Drill Bits, 7Pcs Countersink...
  • 3 Pack 1/4" Hex Shank HSS Step Drill Bit Set, Perfect Step Drill Bits suitable for drill holes in various material: within 3mm/0.12 inch (Iron...
  • 8 Pack 3/8" shank wood plug cutter drill bit set made of durable carbon steel material,used for tapered 1/4", 3/8", 1/2" ,5/8" wood plugs to cover...
  • 6 Pack 1/4" hex shank 5 flute countersink drill bit made of high speed steels and with 6 different diameter sizes 6mm(1/4"), 8mm(5/16"), 9mm(3/8"),...
  • 7 Pack three pointed countersink drill bits made of high speed steel with good abrasion resistance and durable,includes 3mm, 4mm, 5mm, 6mm, 7mm, 8mm,...
  • 8 Pack Woodworking Center Drill Bit Set come in 8 different sizes: 5/64', 7/64'', 2 of 9/64'', 11/64'', 13/64'', 5mm and 1/4".
Bestseller No. 15
QWORK Countersink Drill Bits Center Punch Set 6 Pcs 1/4'' Hex Shank HSS 5 Flute Countersink 90...
  • 1) Professional countersink bits for sinking 90 degree holes into wood and plastic countersunk screws and fixings
  • 2) The self-starting point and five-fluted design eliminates chatter and vibration for smooth operation to make clean, accurate and burr-free cuts
  • 3) Constructed with high-speed steel and coated with super-hard titanium, this bit has the durability to withstand high-heat conditions for lasting...
  • 4) 6 pieces bits with popular size: 6mm(1/4"), 8mm(5/16"), 9mm(3/8"), 12mm(1/2"), 16mm(5/8"), 19mm(3/4")
  • 5) 1/4" quick change Hex shank fits all handheld and stationary drills as well as the power drivers, Countersink ideal for Wooden...
Bestseller No. 16
FTG USA Wood Countersink Drill Bit Set 6 Sizes Set Countersink HSS M2 Tapered Drill Bits, Quick...
  • Countersink drill bit set for wood with tapered drill bit 3rd Party Tested HSS M2, 4 Flute countersink cutter #45 Carbon Steel tapered countersink set...
  • Wood drill bit set with adjustable 4 Flute Cutter counter bore chamfer angle 82 degree, smooth countersinking in hard and soft wood, tapered holes for...
  • Tapered drill bits pointed tip and wide flute for drilling fast, clean pilot hole, ensures tight fit for screws. Countersink hex drill bit set with...
  • THIRD-PARTY TESTED by US Accredited Lab - HSS M2 Grade 6542 countersink drill bit for wood with tapered drill bits. Wood countersink bit with wider...
  • STORAGE CONTAINERS for this set available below on this page at section " Make it a bundle". Counter sinker drill bit set designed in New Jersey by...
Bestseller No. 17
amoolo 10-Pack Countersink Drill Bit Set with 1 Free Hex Key Wrench, 7 Pcs High Carbon Steel...
  • 【IDEAL COMBO SET】7 countersink drill bits size of Ø7/64”(3mm), 5/32”(4mm), 13/64”(5mm), 1/4”(6mm), 9/32”(7mm), 5/16”(8mm) combine...
  • 【PREMIUM QUALITY】Made with industrial grade high-carbon steel, great hardness provides sharp edges, high strength takes bits with superior cutting...
  • 【EFFICIENT DESIGN】For 7 countersink drill bits, 3-point tricuspid ensures drill process accurate and fast, no offset, slip and bias during...
  • 【REMOVABLE& ADJUSTABLE】Perfect for Wooden planks, Fiberboard, Particle board, Plywood, Plastic, PVC and soft metals. Suitable for hand drill,...
  • 【SOPHISTICATED DESIGN】Extra straightening drill bit with exquisite countersink pedestal provide user a method of drilling a countersink hole with...
SaleBestseller No. 18
Snappy Tools Quick-Change 5-Pc. Countersink Drill Bit Set. Proudly Made in the USA.
  • In one step, you can drill, countersink and counter bore the perfect sized hole for #4, #6, #8, #10, or #12 screws.
  • Snappy Tools Countersinks will drill the pilot hole and countersink or counter-bore for screws in one step. Countersink to drive the head of the screw...
  • Ideal for plugs or dowel buttons. The 1/4" hex shank can be used with power drills and quick-change chucks.
  • Experience the higher quality of Snappy Tools. Combining higher quality materials and patented technology, Snappy delivers industrial quality tools to...
  • Made in USA by Snappy; Includes 5 Gold Screw Countersinks: 5/64x3/8, 3/32x3/8, 7/64x3/8, 1/8x3/8 & 9/64x1/2
SaleBestseller No. 19
BOSCH SP515 4 Piece Hex Shank Countersink Drill Bit Set with #6, 8, 10, and #12
  • Four-piece set includes no. 6, 8, 10 and 12 hex shank screw pilot bits
  • Countersink screw pilot bits – designed for hex shanks for countersinking precision pilot holes
  • One-step operation – provides countersinking and counterboring in one operation
  • Replaceable drill bits – for longer accessory life
  • Adjustable Countersink depth – for use with an Allen wrench
Bestseller No. 20
Countersink Drill Bit Set Wood Hole Drill Bit Timber Wood Working Drill Bits for Wood Screw Cutter...
  • 【 Durability&High Hardness】Made of classic carbon steel material, high hardness, offer superior cutting power and durable.Widely used suitable for...
  • 【Three Pointed Design】Quickly and accurately drill a smooth hole. Better in centering and no skid.Five-edged chamfer design will fast discharge...
  • 【Different Sizes】Our Countersink drill bit sets include 6 kinds of sizes:2.8 x 8mm(7/64''×5/16"), 2.8 x 10mm(7/64"×3/8"), 3 x...
  • 【Removable and Adjustable】This countersink drill set is contains 6pcs hex key wrench, use the hex key to adjust counter sleeve depth and drilling...
  • 【Suitable for Woodworking】Compatible with drilling machines with chuck, for drilling in wood or wood flooring. It is recommended to use the center...

Having trouble finding a great countersink bit for wood?

This problem is well understood by us because we have gone through the entire countersink bit for wood research process ourselves, which is why we have put together a comprehensive list of the best countersink bit for woods available in the market today.

After hours of searching and using all the models on the market, we have found the best countersink bit for wood for 2022. See our ranking below!

How Do You Buy The Best Countersink Bit For Wood?

Do you get stressed out thinking about shopping for a great countersink bit for wood? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching countersink bit for wood, which is why we have assembled a comprehensive list of the greatest countersink bit for wood available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for countersink bit for wood that you consider buying. Your questions might include the following:

  • Is it worth buying an countersink bit for wood?
  • What benefits are there with buying an countersink bit for wood?
  • What factors deserve consideration when shopping for an effective countersink bit for wood?
  • Why is it crucial to invest in any countersink bit for wood, much less the best one?
  • Which countersink bit for wood are good in the current market?
  • Where can you find information like this about countersink bit for wood?

We’re convinced that you likely have far more questions than just these regarding countersink bit for wood, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for countersink bit for wood, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible countersink bit for wood. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an countersink bit for wood buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available countersink bit for wood currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of countersink bit for wood has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an countersink bit for wood?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your countersink bit for wood.
  5. Customer Ratings: Number ratings grade countersink bit for wood objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their countersink bit for wood.
  7. Product Quality: You don’t always get what you pay for with an countersink bit for wood, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an countersink bit for wood is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining countersink bit for wood information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding countersink bit for wood is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What is the best corded drill for woodworking?

A: 10 Best Corded Drills for Woodworking DEWALT Electric Drill DWD210G. Dewalt Electric Drill DWD210G is the one known for its versatile design and longevity. … SKIL 6335-02 Corded Drill. Skil 6335-02 Corded Drill is a pro-grade drill meant for drilling tough wood or other hard surfaces. PORTER-CABLE Corded Drill PC600D. … Utool Rotary Tool Kit. … Meterk Hammer Drill. … TACKLIFE Hammer Drill. … More items…

Q: What size bit do you use to countersink?

A: The size of your countersink bit should match the size of the screw you plan to use. The number size of the screw is typically on the packaging. #6, 8 and 10 are most common. Make sure the screw has a flat head with a conical shape underneath.

Q: How to use a countersink bit?

A: Mark the hole position on the wood piece. Choose the correct countersink bit size for the screws. Adjust the countersink bit height to match the screw length. Insert the bit into the chuck of the drill. Drill the countersink hole at the marked spot. Start the drill off fast to penetrate the wood,then slow down the speed when making the countersink hole. Test the fit with the screw,making sure the head rests below the surface of the wood. Cover screw head with wood filler or wood plug,if desired.

Q: What is the countersink tool used for in woodworking?

A: Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring. For use on wood, plastic, and most metals, these countersinks attach to a drill bit (sold separately) to countersink and drill holes at the same time.