Shank : 3mm (close to 1/8") Package Included: 1 x 50 pcs Diamond coating rotating grinding head Features: Suitable for use in grind the edge of glass, tile, marble, jewlery or rock Largest head size : 16mm (close to 5/8") Smallest head size : 2. 3mm (close to 3/32") There are many shapes such as sphere, cylinder, round head cylinder, needle, flat plate, etc. fit dremel or other brand rotary tools.
