20 Best Diamond Tool Bits [2025]

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

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# Preview Product
1 Diamond Burr Bits, ZFE Diamond Burr Bits Drill Kit for Rotary Tool Metal Woodworking Router Grinding... Diamond Burr Bits, ZFE Diamond Burr Bits Drill Kit for Rotary Tool Metal Woodworking Router...
2 Diamond Drill Bit Set Hole, 15PCS Hole Saw Set for Glass, Marble, Granite Stone Diamond Drill Bit Set Hole, 15PCS Hole Saw Set for Glass, Marble, Granite Stone
3 60 Grit 20Pcs ๐——๐—ถ๐—ฎ๐—บ๐—ผ๐—ป๐—ฑ ๐—•๐˜‚๐—ฟ๐—ฟ ๐—ฆ๐—ฒ๐˜ - GOXAWEE Rotary Grinding... 60 Grit 20Pcs ๐——๐—ถ๐—ฎ๐—บ๐—ผ๐—ป๐—ฑ ๐—•๐˜‚๐—ฟ๐—ฟ ๐—ฆ๐—ฒ๐˜ - GOXAWEE Rotary...
4 Stone Carving Set Diamond Burr Bits, 20PCS Polishing Kits Rotary Tools Accessories with 1/8โ€™ Shank... Stone Carving Set Diamond Burr Bits, 20PCS Polishing Kits Rotary Tools Accessories with 1/8โ€™...
5 Cedilis 43-Pack Stone Carving Set - 26 Diamond Burr Bits, 10 Impeller, 4 Diamond Cutting Wheel, 3... Cedilis 43-Pack Stone Carving Set - 26 Diamond Burr Bits, 10 Impeller, 4 Diamond Cutting Wheel, 3...
6 Stone Carving Set Polishing Rotary Tools Diamond Burr Accessories for Carving/Engraving Stone,... Stone Carving Set Polishing Rotary Tools Diamond Burr Accessories for Carving/Engraving Stone,...
7 Oudtinx 50pcs Diamond Coated Grinding Head Grinding Burrs Set for Dremel Rotary Tool Oudtinx 50pcs Diamond Coated Grinding Head Grinding Burrs Set for Dremel Rotary Tool
8 The Beadsmith Burr Set โ€“ 10-Piece Diamond Coated Bits โ€“ 150 Grit with 2.35mm or 3.17mm Shanks... The Beadsmith Burr Set โ€“ 10-Piece Diamond Coated Bits โ€“ 150 Grit with 2.35mm or 3.17mm Shanks...
9 Diamond Grinding Burr Drill Bit, 20 PCS Diamond Burr Set with 1/8 Inch Shank Universal Fitment... Diamond Grinding Burr Drill Bit, 20 PCS Diamond Burr Set with 1/8 Inch Shank Universal Fitment...
10 Diamond Hole Saw, 15 pcs Diamond Drill Bits Set Glass Drill Bit Extractor Remover Tools for Glass,... Diamond Hole Saw, 15 pcs Diamond Drill Bits Set Glass Drill Bit Extractor Remover Tools for...
11 Diamond Drill Bit Diamond Hole Saw Set 10 Pieces 1/4, 3/8, 1/2 (0.5 Inch), 3/4, 1, 1 1/4, 1 3/8, 1... Diamond Drill Bit Diamond Hole Saw Set 10 Pieces 1/4, 3/8, 1/2 (0.5 Inch), 3/4, 1, 1 1/4, 1 3/8,...
12 Rokrou Diamond Hole Saw Set 15 PCS Tile Hole Saw Kit with Drill Guide from 6mm-50mm /1/4โ€˜โ€™- 2โ€... Rokrou Diamond Hole Saw Set 15 PCS Tile Hole Saw Kit with Drill Guide from 6mm-50mm /1/4โ€˜โ€™-...
13 SE 30-Piece Set of Titanium-Coated Diamond Burrs, Grits 120-150 - 82331TF SE 30-Piece Set of Titanium-Coated Diamond Burrs, Grits 120-150 - 82331TF
14 Diamond Drill Bit, 10 pcs Glass Diamond Hole Saw Set Drill Bits Extractor Remover Tools for... Diamond Drill Bit, 10 pcs Glass Diamond Hole Saw Set Drill Bits Extractor Remover Tools for...
15 Master Jewelers 10 Diamond Circular Saw Blade Set in Display 50 Rough Diamond Burrs Burs Rock... Master Jewelers 10 Diamond Circular Saw Blade Set in Display 50 Rough Diamond Burrs Burs Rock...
16 DT-DIATOOL Diamond Beveling Chamfer Bits for Granite Marble Tiles Existing Holes Diamond Hole Saw... DT-DIATOOL Diamond Beveling Chamfer Bits for Granite Marble Tiles Existing Holes Diamond Hole Saw...
17 Diamond Drill Bits, Baban 10Pcs Hole Saw Diamond Drill Bit Hollow Core Drill Bit Set for Diamond... Diamond Drill Bits, Baban 10Pcs Hole Saw Diamond Drill Bit Hollow Core Drill Bit Set for Diamond...
18 Diamond Drill Bits 1mm Set Jewelry Making Supplies Diamond Drill Bits for Glass Diamond Tipped Drill... Diamond Drill Bits 1mm Set Jewelry Making Supplies Diamond Drill Bits for Glass Diamond Tipped...
SaleBestseller No. 1
Diamond Burr Bits, ZFE Diamond Burr Bits Drill Kit for Rotary Tool Metal Woodworking Router Grinding...
  • โ–ฒ90pcs Diamond Burrs - Excellent for fine detail work, cutting, engraving, carving, touch-up and finishing; Work on glass, metal , stone, ceramic,...
  • โ–ฒSold Storage Box - PC plastic box is sturdy, falling resistant and moistureproof, easy for carrying and hanging; All parts were in order and set...
  • โ–ฒDifferent Sharp Bits Accessories - 30 Style different sharp router bit can reach More Carving, Great for all types of detail work.
  • โ–ฒWide Usage - 1/8" diameter shanks, compatible with most rotary tools; Ideal for home improvement, craft and whenever you need to polish, grind,...
  • โ–ฒWhat You Will Get - ZFE 90-Piece rotary tool carving,engraving bits kit and our best service
SaleBestseller No. 2
Diamond Drill Bit Set Hole, 15PCS Hole Saw Set for Glass, Marble, Granite Stone
  • ใ€Glass Drill Bitใ€‘These diamond drill bits are made of industrial grade carbon steel with nickel-plated coated body to resist corrosion. Fine...
  • ใ€High Quality Drillใ€‘Each hole is treated with smooth and accurate surface treatment,and the top oh the hole is thickened to achieve excellent...
  • ใ€Tile Hole Saw 15 Sizesใ€‘ 6/ 8/ 10/ 12/ 14/ 16/ 18/ 20/ 22/ 25/ 26/ 28/ 30/ 40/ 50 mm๏ผŒto meet various demands
  • ใ€Wide Usageใ€‘Used on Drill Glass,Wood,Tile Bottles,Blocks Jars, Ceramic,Slate Mable, Granite Light Stone, and other hard surfaces
  • ใ€Attentionใ€‘Please keep adding water when the diamond drill bits are working on the glass or ceramics.low drill pressure and increased use of water...
SaleBestseller No. 3
60 Grit 20Pcs ๐——๐—ถ๐—ฎ๐—บ๐—ผ๐—ป๐—ฑ ๐—•๐˜‚๐—ฟ๐—ฟ ๐—ฆ๐—ฒ๐˜ - GOXAWEE Rotary Grinding...
  • โ˜… 60 GRIT: #60 Grit Diamond Rotary Grinding set, rougher surface which are quicker than the larger grit burrs when Sanding, Polishing and Engraving.
  • โ˜… MULTI-PURPOSE: Diamond Grinding Head Burr uses on stone, glass, wood, tile, ceramics, marble, granite and other hard materials
  • โ˜… MULTI-FUNCTION: GOXAWEE Diamond burr bits have 10 different grinding bits for abrasive, engraving, cutting, polishing, carving and etching
  • โ˜… ๐—–๐—ข๐— ๐—ฃ๐—”๐—ง๐—œ๐—•๐—œ๐—Ÿ๐—œ๐—ง๐—ฌ: Universal 3mm (1/8") shank grinding drill bits fit for GOXAWEE G4007, G4115, G5225 and most...
  • โ˜… EXQUISITE PACKAGING: 20Pcs Diamond rotary burr set of higher quality is orderly packed in a nice bag as shown, easy to place and carry
Bestseller No. 4
Stone Carving Set Diamond Burr Bits, 20PCS Polishing Kits Rotary Tools Accessories with 1/8โ€™ Shank...
  • 1. Precision work - Durable excellent for fine detail work, polishing, sanding, grinding, cutting, engraving, carving, touch-up and finishing; Works...
  • 2.Different Shapes - Polishing kits set have 6 different heads used for various applications meet different needs. Highly recommended for carving and...
  • 3.Universal Shank - All diamond grinding burrs with 1/8" shank compatible with most rotary tools and ย die grinders.
  • 4.Durable Storage Box - 20pcs Grinding heads packaged in a sturdy plastic box, falling resistant and moistureproof, easy to carry and stock, well...
  • 5.100% Quality Guarantee - Buy with confidence, please feel free to leave us a message, if there is any problem or issue you would like us to address....
Bestseller No. 5
Cedilis 43-Pack Stone Carving Set - 26 Diamond Burr Bits, 10 Impeller, 4 Diamond Cutting Wheel, 3...
  • Include 43 pack diamond burr cutting set: 26 diamond burr bits, 4 diamond cutting wheels, 3 metal Mandrel and 10 impellers.
  • All burrs with a 1/8" shank is compatible with most dremel tool, rotary tools, WEN and die grinders.
  • Diamond burr bits have different shapes: ball, cone, cylinder, needle point and tapered with 3 kinds of size: 3*3, 3*6, 3*8.
  • The cutting wheels diameters are 20mm and 30mm, the impellers are 12mm and 15mm, the Mandrel Diameter is 3mm
  • Perfect for cutting gemstones, glass, porcelain, tiles, carbide, rocks, ceramics, aluminium and copper, great for crafts, hobbies, home repair,...
Bestseller No. 6
Stone Carving Set Polishing Rotary Tools Diamond Burr Accessories for Carving/Engraving Stone,...
  • With a approx. 1/8" shank - compatible with most Dremel universal power rotary tools.
  • Assortment of shapes and sizes include: impeller, rounded cylinder, cylinder, tapered & needle.
  • Highly recommended for carving and cutting stones, rocks and mortar, DIY engraving hobbies, craft modeling, home repair (wood, some plastic and...
  • Package: 44pcs with plastic box.
  • Our honor to serve for you, buy with confidence.
Bestseller No. 7
Oudtinx 50pcs Diamond Coated Grinding Head Grinding Burrs Set for Dremel Rotary Tool
  • Suitable for Grinding field stone, ceramics, glass, carbide, tile, marble, jewelry or rock
  • Designed for Rotary Tools including Dremel.
  • Various Shapes meet your different needs, Such as,Cylinder head, cylinder, sphere, umbrella, bullet, Ding sheet type, inverted ladder, needle tip.
  • Material: Diamond,Alloy, Color: Silver Tone as shown on the picture.
  • Diameter of shank: 1/8 Inch,Grit: 120
SaleBestseller No. 8
The Beadsmith Burr Set โ€“ 10-Piece Diamond Coated Bits โ€“ 150 Grit with 2.35mm or 3.17mm Shanks...
  • BURR DRILL BITS: These reamers are used to enlarge a hole in a bead, and to smooth the edges of the drill hole. The files are made from steel and are...
  • PROFESSIONAL GRAIN: The metal file is encrusted with industrial grade diamond great for repeated use. This product is great quality and long lasting....
  • MULTI-PACK: Set includes 10 diamond-tip bits that measure 1.75โ€ in length. They are 150 grit with 2.35mm or 3.17 shanks. The diamond drill bit come...
  • FLAWLESS FINISH: Add to a drill and make bead holes larger, remove unwanted burrs from bead holes before stringing and smooth and file rough edges....
  • THE BEADSMITH โ€“ 40 years in the making! Trusted to bring you the best quality beads, tools, and supplies. Making jewelry should be a positive...
Bestseller No. 9
Diamond Grinding Burr Drill Bit, 20 PCS Diamond Burr Set with 1/8 Inch Shank Universal Fitment...
  • ใ€WIDELY USAGEใ€‘Diamond burr set suitable for small projects, used for sculpturing, dressing, precision grinding and sanding in ceramic, glass,...
  • ใ€UNIVERSAL COMPATIBILITYใ€‘3mm(1/8") shank diamond grinding burr drill bits set fit for most rotary tools or die grinders. High compatibility, easy...
  • ใ€MATERIALใ€‘#60 Grit diamond-coated grinding head made of diamond particles with rougher surface, uniform sand, thick and durable, wear resistance,...
  • ใ€DIAMOND GRINDING BITSใ€‘20 PCS diamond grinding burr bits with various shapes, includes sphere, cone, cylinder, round head cylinder, bullet, etc,...
  • ใ€QUALITY ASSURANCEใ€‘You will get 20 pcs diamond grinding bit, a clear case. If any issues with quality, leave us a message and we will provide a...
Bestseller No. 10
Diamond Hole Saw, 15 pcs Diamond Drill Bits Set Glass Drill Bit Extractor Remover Tools for Glass,...
  • EXTREME HARD - Made of industrial grade carbon steel with nickel-coated body to resist corrosion.
  • THICKEN DIAMOND COATING - on the tops offers superior cutting strength for maximum drilling outcomes.
  • LARGE CLEARANCE HOLE - The glass hole saw set along the drill bit facilitate the entrance of cooling water and escape of chips and other particles...
  • WIDE USAGE - Ideal for drilling glass, tile, porcelain tile, ceramic tile, brick, and stone.
  • WARM NOTE - Before beginning, you need to dip the drill bit into the water, which can avoid dust flying around and cool down the drill bit.
SaleBestseller No. 11
Diamond Drill Bit Diamond Hole Saw Set 10 Pieces 1/4, 3/8, 1/2 (0.5 Inch), 3/4, 1, 1 1/4, 1 3/8, 1...
  • PREMIUM QUALITY, LONG LASTING Diamond Hole Saw Drill Bit Tool Set in Elegant PU Zipper Storage Case.
  • Diamond Hole Saw Guide INCLUDED - High Density Poly Insert. Diamond Drill Bit Tools 10 Piece Set 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 3/8, 1 1/2, 1 3/4, 2...
  • BUY AS A SET and SAVE OVER 80 Percent on MOST POPULAR 10 Sizes. Having these sizes available will help you cover almost all of your applications.
  • Our hole saws are taller than most competitors. You can drill through thicker materials with our tools. Shank size is 3/8 inch for common drills...
  • EXCELLENT RESULTS in Quartz, Granite, Ceramic & Porcelain Tiles, Glass, Marble, Slate, and many types of Stones. No need for pilot drill, use the...
SaleBestseller No. 12
Rokrou Diamond Hole Saw Set 15 PCS Tile Hole Saw Kit with Drill Guide from 6mm-50mm /1/4โ€˜โ€™- 2โ€...
  • ๐”พ๐• ๐• ๐•• ๐•„๐•’๐•ฅ๐•–๐•ฃ๐•š๐•’๐•โ€”โ€” Hole saw set are made of carbon steel and coated with nickel to resist corrosion. Diamond hole...
  • ๐Ÿ™๐Ÿ ๐”ป๐•š๐•—๐•—๐•–๐•ฃ๐•–๐•Ÿ๐•ฅ ๐•Š๐•š๐•ซ๐•–๐•ค โ€”โ€”Diamond Hole Saws 15PCS contains: 6mm/0.24" 8mm/0.31" 10mm/0.39" 12mm/0.47"...
  • ๐”ธ๐••๐•›๐•ฆ๐•ค๐•ฅ๐•’๐•“๐•๐•– ๐”ป๐•ฃ๐•š๐•๐• ๐”พ๐•ฆ๐•š๐••๐•–โ€”โ€”No need to worry about scratching your tile when drilling the...
  • โ„๐• ๐•๐•๐• ๐•จ โ„‚๐•ฆ๐•ฅ ๐•†๐•ฆ๐•ฅโ€”โ€”The large clearance holes on drill bits help cooling with water and rinse chips and other...
  • ๐•๐•–๐•ฃ๐•ค๐•’๐•ฅ๐•š๐•๐•–โ€”โ€”Diamond hole saw and guide set is a nice set to help you with home modification, wine bottle craft, glass or...
Bestseller No. 13
SE 30-Piece Set of Titanium-Coated Diamond Burrs, Grits 120-150 - 82331TF
  • Titanium-coated diamond burrs
  • Assorted shapes and sizes include: ball, cone, cylinder, needle point, and tapered
  • All burrs with a 1/8" shank - compatible with most die grinders or rotary tools
  • A versatile set for numerous projects with grits 120-150
  • Highly recommended for crafts, hobbies, home repair, jewelry, lapidary use, modeling, and so much more
Bestseller No. 14
Diamond Drill Bit, 10 pcs Glass Diamond Hole Saw Set Drill Bits Extractor Remover Tools for...
  • 【EXTREME HARD 】These diamond drill bits are made of industrial grade carbon steel with nickel-plated coated body to resist corrosion. A...
  • 【EXTRAORDINARY SHARP】Each diamond hole saw has a smooth and exact finish that lower the incision resistance and drill pressure, increases...
  • 【LARGE CLEARANCE HOLE】These glass hole saw set along the drill bit facilitate the entrance of cooling water and escape of chips and other...
  • 【WIDE USAGE】 10 different drill bits included with this glass drill bit set to meet various demands. Perfect for drilling glass, tile,...
  • 【 LIVE SUPPORT 】 For any questions, call or email the contact information that comes with the package. We stand behind our high quality...
SaleBestseller No. 16
DT-DIATOOL Diamond Beveling Chamfer Bits for Granite Marble Tiles Existing Holes Diamond Hole Saw...
  • 1 Piece 2 Inch Diamond Beveling Chamfer Bits for Granite Marble Tiles
  • Dia 50mm/2": workable length 46mm; With the thread of 5/8"-11 for angle grinder
  • Designed to enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, Granite and Marble
  • Diamond beveling chamfer bit can bevel or chamfercrated rough holes on glass,granite, marble, stones,ceramic and porcelain tiles
  • This is a save money tool because with just one standard core bit and this finger bit you are able to create many different hole sizes, without...
Bestseller No. 17
Diamond Drill Bits, Baban 10Pcs Hole Saw Diamond Drill Bit Hollow Core Drill Bit Set for Diamond...
  • โœ” Satisfied Size - 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", 14mm/0.55", 16mm/0.62", 18mm/0.7", 22mm/0.86", 26mm/1.02", 32mm/1.26"
  • โœ” Ideal Application - This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.They are...
  • โœ” Super Material - These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good...
  • โœ” Sharp&Smooth Cut - Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill...
  • โœ” Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or...
SaleBestseller No. 18
Diamond Drill Bits 1mm Set Jewelry Making Supplies Diamond Drill Bits for Glass Diamond Tipped Drill...
  • Set of 30 PCS 1mm Diamond Drill Bits - 1/8 inch Standard Shank Compatible with Dremel Tool Accessories and Other Lapidary Equipment. These Diamond...
  • Premium Quality, Strong Alloy Steel Diamond Coated Glass Drill Bit Set As Jewelry Drill and Lapidary Supplies. Drilling Holes in Glass to Create...
  • This is a Small Drill Bit Set To Drill a Hole in Glass or Stone Start Holding Diamond Bits at an Angle - Go Vertical Later - Submerge the Tip of the...
  • 1mm Diamond Drill Bits for Stone with Solid Steel Body Compatible with Dremel Bit Set and Spins True. With the Standard Shank These Jewelry Tools Do...
  • High Quality Premium Triple Layer Diamond Coating with Extra Diamond Coated Tip Starts Easy Compatible with Diamond Bits for Dremel Tool

Having trouble finding a great Diamond Tool Bits?

This problem is well understood by us because we have gone through the entire Diamond Tool Bits research process ourselves, which is why we have put together a comprehensive list of the best Diamond Tool Bitss available in the market today.

After hours of searching and using all the models on the market, we have found the best Diamond Tool Bits for 2023. See our ranking below!

How Do You Buy The Best Diamond Tool Bits?

Do you get stressed out thinking about shopping for a great Diamond Tool Bits? Do doubts keep creeping into your mind?

We understand, because weโ€™ve already gone through the whole process of researching Diamond Tool Bits, which is why we have assembled a comprehensive list of the greatest Diamond Tool Bits available in the current market. Weโ€™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 itโ€™s still crucial that you do thorough research on your own for Diamond Tool Bits that you consider buying. Your questions might include the following:

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

Weโ€™re convinced that you likely have far more questions than just these regarding Diamond Tool Bits, 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 Diamond Tool Bits, 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 Diamond Tool Bits. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an Diamond Tool Bits 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 Diamond Tool Bits 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 Diamond Tool Bits has a value all its own. Most brands offer some sort of unique selling proposition thatโ€™s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Diamond Tool Bits?
  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 Diamond Tool Bits.
  5. Customer Ratings: Number ratings grade Diamond Tool Bits objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Diamond Tool Bits.
  7. Product Quality: You donโ€™t always get what you pay for with an Diamond Tool Bits, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Diamond Tool Bits is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining Diamond Tool Bits 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 Diamond Tool Bits is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What are the best drill bits?

A: Best Drill Bits Reviewed and Rated. Some of the materials used to make drill bits are carbon steel, high-speed steel (HSS), cobalt steel, titanium-coated, and lastly carbide. Carbide drill bits are the best when it comes to drilling through very tough materials, despite being comparatively more costly.

Q: Which drill bit is stronger carbide or cobalt?

A: Cobalt is best,but a good HSS bit is fine if it’s from a quality source. … Keep them sharp. Most drill bits aren’t as sharp as they could be,even out of the packaging. … Split points for metal is the way to go. Keeps the bit from wandering. Use cutting fluid. … Let the bit do the cutting,not pressure. …

Q: What are the best drill bits for wood?

A: The DEWALT DW1361 drill bits are the best bits for wood because they are very effective and they are also long-lasting. The set includes 21 bits; they range in size from 1/16th inch to 1/2 inch so they can be used to drill holes for your most common woodwork projects and even some that may not be considered as common.

Q: Why are diamonds used to make drill bits?

A: Diamond is commonly used in the petroleum and mining industries. Diamond drill bits and coring bits are used for oil well drilling and obtaining core samples. Diamond is also incorporated into circular saws that are used for cutting slabs of marble, granite, and other types of extremely hard stone from quarried blocks.