Material: diamond
Shank Diameter:2.35mm(3/32inch).
Head Diamster:0.5/1.0/1.5/2/2.5/3/4/5/6/8mm(0.02/0.04/0.06/0.08/0.10/0.12/0.16/0.20/0.23/0.31inch).
Head thickness:1mm(0.04inch).
Total Length:40mm(1.57inch).
For: sculpturing grinding stone, ceramic, glass
Package Included:10 pcs Ultra-Thin T Head Grinding Bit