Diamond Coated Drill Bits

These quality twist drills are electroplated with diamond particles, they are the ultimate for drilling glass, gemstones, sea glass, pearls or ceramics (for drilling metals use a regular steel drill bit).

The technique for drilling is slightly different from the drilling metals; they need to be used at a slow speed and water must be used as a lubricant. They are available in a variety of useful diameters.

If you are not familiar with the technique, we recommend purchasing our 'Using Diamond Coated Drill Bits' advice leaflet. 

Available in a range of sizes:

• 0.8mm (20gauge) (2.3mm shank)
• 1mm (18 gauge) (0.66mm shank)
• 1.5mm  (15 gauge) (1.2mm shank)
• 2mm (12 gauge) (1.6mm shank)

If you are intending to use these drill bits with a Dremel 4000 Multi Tool you will need a multi chuck tool

If you are considering purchasing these for enlarging the holes in beads you may prefer our deluxe bead reamer set which is specifically designed for this purpose. 

All of our products are covered by our guarantee.

Click below to read our helpful pages:

• How to drill sea glass for jewellery making
• 4 drilled sea glass projects
• Advice page on Dremel 4000 Multi Tool
• Purchase 'Using Diamond Coated Drill Bits' leaflet
• How to make bead holes bigger

THESE WORK! (by Barbara 01/02/2019)

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Delivery Information:

We are still open and dispatching orders as quickly as we can but please allow for some delays and read our Coronavirus update page for full details here.

Orders placed before midday are despatched the same day (wherever possible), Monday to Friday, excluding bank holidays.

*Orders for Next Day Delivery must be placed before 12pm, Monday to Friday. Heavy orders weighing over 1.5Kg must be placed before 10.30am - usually only orders containing machines and multiple tools. You will receive your order the following day not including Saturday & Sunday (Deliveries for highlands & islands may take a little longer). Next day and Saturday Delivery are signed for services. 

Click here for full delivery information & international options

*Next day deliveries for highlands & islands may take a little longer.

**Update to services - Royal Mail & couriers have suspended guarantees for Next Day Deliveries, the service will still remain a priority service but no refund of delivery fees will be available for late deliveries.