New assorted 3-12mm diamond coated hole saw / drill bits (total: 10 pieces). Suitable for use in drilling holes in glass, marble, tile or granite.

Just like our standard diamond drills except with a dremel or mini rotary tool sized shank. Shaft size is nominal 1/8 inch or 3.2 mm and will fit most collets in dremel foredom and similar tools. Drills are 60mm long overall and are made with 50 grit diamond sand.

One of each size, 10 in full set:

3mm outside diameter, 3mm shank,

4mm outside diameter, 4mm shank,

5mm outside diameter, 5mm shank,

6mm outside diameter, 6mm shank,

7mm outside diameter, 6mm shank,

8mm outside diameter, 6mm shank,

9mm outside diameter, 6mm shank,

10mm outside diameter, 6mm shank,

11mm outside diameter, 6mm shank,

12mm outside diameter, 6mm shank,

The shanks on these drills are solid.

Use lots of water when drilling or you will wear the bits out rapidly and break lots of glass! You can just use a dripper or a water bottle, or make a dam around the hole with putty or wax and fill it with water.