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Small Diamond Twist Drills


0.5mm - 3.00mm

These drills are like a regular twist drill but coated in diamond grit making them possible to use on hard materials such as stone, glass, ceramics, porcelain, and shell. They are perfect for enlarging holes in beads.

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£0.00 £3.50


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HINT: Use for opening up holes

These drill bits have diamond grit running along the tip and sides allowing them to remove material horizontally as well as vertically, they are especially good for widening existing holes. Try them on your beads.

These twist drills are used by lamp workers and bead jewellers and also by many industrial companies for ceramics. And if you need to de-mist your double glazing, try using a 3mm twist drill in the corner at the bottom. Magic!


Diamond grit is precisely electroplated onto a steel shank

  • Overall length: 25mm - 60mm
  • Diamond working length: 10mm - 35mm
  • Diameter: 0.5mm - 3mm

Customer Reviews

Ok 0000000000000000000000000000000000000
nagta-type ang buong pangungusap sa iyong langagetake isa tablet, isang beses sa isang araw sa unang linggo pagkatapos ng isang tablet,
Perfect for drilling small holes in glass and last longer than other more expensive ones on the market.
Excellent product which we use and use and use without any problems. We use these bits for drilling out Pearls. They leave smooth holes and are easy to use.
I've both bought Diamond Twist Drills and Diamond Drill Bits this time.<br/>I use them to drill synthetic and natural stones (quartz, opalite, goldstone, amethyst, agate, fluorite, howlite, tiger eye...).<br/>Though the drills and bits seem more efficient with synthetic stones, it appears that some of them wear out pretty fast... Sometimes one drill/bit is not enough to drill through a 8mm thick stone.<br/>It even happened that the diamond "coating" of one of the drill bit just popped off the bit (see attached picture).<br/><br/>And in the past I bought a bunch of different diamond twist/drill bits.<br/>And with my previous order (30 diamond drill bits, April 2015), all the bits just wear off surprisingly quickly (compare to my very first order). I ended up breaking 90% of my stones, though respecting the same precautions as before.<br/><br/>Maybe a more precise condition of use, or advices would be appreciated to use these items.<br/><br/>Though I had some bad surprises, I keep buying from Eternal Tools, as sometime it just work fine, and as I didn't find another supplier to compare.<br/>So with this mixed experiences, I rated the product "-" as it could be more consistant.
Drills performed well boring through glass plate. First time I have tried this - make sure there is plenty of cold water around the drill bit and keep the revs low.
seem to do the job...........................................

Questions & Answers

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Other questions and our answers

Will your drill bits fit my drill?


Hi Clare, 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).

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