There are many shapes such as sphere, cylinder, round head cylinder, needle, etc..... fit dremel or other brand rotary tools.
Shank : 2.35mm (close to 3/32")
Largest head size : 3.5mm
Smallest head size : 1.2mm
Diamond sands : Grit 60
Suitable for use in grinding the edge of glass, tile, marble, jewlery or rock. Come with a PVC box as shown in the picture.
Please use water as coolant if possible.