Shank: 1/8"Cutter Size: 3/32" Diameter X 11/32" LongRemoves Material Quickly And EasilyFor Fine Detail Work, Cutting, Engraving, Carving Touch-Up And FinishingUse On Wood, Jade, Ceramic, Glass, Hardened Steel, Semi-Precious Stones And Other Hard MaterialsBits Are Covered With Diamond Particles