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Small Diamond Drill Bits


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Quantity Purchased Price
1 - 4 £5.50
5 - 9 £4.50
10 - 24 £3.45
25 + £3.05

Sizes available:  0.75mm, 1.00mm, 1.25mm, 1.50mm, 2.00mm, 2.50mm, 3.00mm

These precision made small diamond drill bits are excellent for drilling small holes in some of the hardest materials around. Very common with jewellery makers, these diamond drill bits are used for drilling holes in shells, drilling holes in glass, drilling holes in beads, drilling holes in sea glass and drilling holes in stone, gemstone, concrete and pebbles.

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You will need a Dremel 4486 Multi Chuck or a Dremel 4485 Collet Nut Kit to hold these small drill bits if you do not already have an attachment on your drill.

In order to get the best from our diamond tipped drill bits, please ensure you read through the Tutorials section on our blog before attempting to use our drills for the first time. Here you will find tips and video footage on how to drill glass, how to drill gemstones, how to drill bottles, how to drill pebbles and how to drill sea glass. There are also helpful hints on the correct speeds and pressure to be used.

You might also like to read our article: 12 Things you Should Know about Diamond Drill Bits

Tip: Always use with plenty of cold water, slow speed, little to no pressure

Disclaimer. Using rotary tools near water has never been, to the best of our knowledge, endorsed by any of the rotary tool manufacturers. If you do choose to drill near water or with attachments under water connected to your drill then you do so at your own risk. Please be aware that mixing electricity and water can be very dangerous.


Diamond grit is precisely electroplated onto a steel shank

Diameter: 0.75mm

  • Overall length: 28mm
  • Diamond tip length: 4.00mm
  • Shank: 0.50mm

Diameter: 1.00mm

  • Overall length: 38mm
  • Diamond tip length: 3.50mm
  • Shank: 0.70mm

Diameter: 1.25mm

  • Overall length: 38mm
  • Diamond tip length: 5.00mm
  • Shank: 0.85mm

Diameter: 1.50mm

  • Overall length: 38mm
  • Diamond tip length: 4.00mm
  • Shank: 1.10mm

Diameter: 2.00mm

  • Overall length: 38mm
  • Diamond tip length: 3.50mm
  • Shank: 1.50mm

Diameter: 2.50mm

  • Overall length: 38mm
  • Diamond tip length: 3.50mm
  • Shank: 2.00mm

Diameter: 3.00mm

  • Overall length: 44mm
  • Diamond tip length: 12mm
  • Shank: 3.00mm

Diameter: 3.00mm x 2.35mm

  • Overall length: 42.5mm
  • Diamond tip length: 12mm
  • Shank: 2.35mm

Customer Reviews

Very pleased with the drill bits - exactly what I needed to make a delicate job much easier.
It's a very slightly different drill. Smaller.
Not yet used, but was very impressed with reviews and price, and service.
As Above
Very good durable drills, that my daughter uses to drill sea glass.
Drilling bits turned out perfect for drilling holes in glass. Keep it up.
This drill acts as though it would cut anything offered up to it.
Very please with drill bit. Bought to make small holes in shells, glass and pebbles. Great on shells, hard work on glass and pebbles, haven't made good progress. First time I have tried this, so am a little unsure if I am doing it right. May be a point on the end not flat. Bits jumps around. But that's me not the goods.
The drill bits arrived promptly on time in good condition. I have not used them yet, however.<br/>The tutorial on how to use them properly was very useful.
Great quality - recommended by fellow glass artists.
Brilliant tools bits & will always order more when these have worn away or broken
drilled hole in pebble. RESULT!
see above - not fit for purpose
The drills worked well as new, but performance declined with use after boring rocks.

Questions & Answers

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Other questions and our answers

I want to enlarge some very small holes in 4 -6 mm rough uncut diamond beads. I need the holes to be 1mm. to accommodate .8 - 1 mm silver wire. Would the drill bits be suitable for this? Should I use a twisted or core drill bit?


To enlarge holes you need to use the Small Diamond Twist drills. 

These are ideal for increasing the size of holes in beads once the hole has been drilled. 

Hi there ,Can this drill bit 3 mm be used for drill on vitrified /mosaic tiles ? Thanks .... antony


Hi Antony, 

Good to hear from you. 

Yes, the small diamond drill bits can be used on this material.  They are ideal for hard materials so glass, enamel, ceramic, stone, glazed pottery and shell, that sort of thing.  

Will your drill bits fit my drill?


Our drill bits will fit all rotary drills so long as you have an adjustable collet or chuck with which to hold the shank of our very small drill bits. Sometimes when buying a drill they will come with an adjustable collet but if you find you are in need of one then we supply either a Dremel Multi Chuck (DMC4486) or a Dremel Collet Nut Kit (DCNK4485).

Will the small diamond drill bits work in a drill press ?


Hello Ann, Yes they work perfectly well in a drill press.  They will work in any drill so long as there is an adjustable chuck to hold the shank of the drill bits. 

Hi, I want to order diamond bits to drill 1mm holes in 500um thick borosilicate glass wafer. Could you please tell me if 0.75mm diameter drill bit would be perfect for that or not. Also, what other items I would need to drill hole along with drilling machine. Besides, could you suggest me which drilling machine would be sufficient for this job. Thank you. Best Regards Deepika Sharma

Deepika Sharma

Hi Deepika,

Good to hear from you. We recommend using a Dremel 3000 drill with a Dremel Multi Chuck and use either the small diamond drill bits or the small diamond core drills. If you are new to drilling holes in glass we recommend trying the core drills first. The size of the core drill indicates the size of the hole you will achieve, so if you need a 1mm hole, you will need to purchase the 1mm diamond core drills. All the best with the project.

Hi, I need a diamond drill bit for my Dremel 3000 for use on semi-precious stones. Do you have these in stock? Many thanks.

Jean Johnson

Hi Jean, Yes you're on the right page, the Small Diamond drill bits are ideal for drilling through semi-precious stones and other such hard materials.  You will need an adjustable chuck to hold the very tiny shanks of these drill bits into your drill. For your Dremel we recommend the Dremel Multi Chuck.

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