Detailed Product Description glass drill bit It is a tool for punching holes in glass, mirrors, and ceramic tile material. Tungsten carbide tip ensure long life and accurate positioning.Surface Treatment: Bright finished, Sandblasted, Ti-coated, Cr-coated, Zn-coated, Ni-coated, etc.Shank Type: Straight shank, Hex Shank Size: 3mm-14mmPackage: PVC bag, plastic tube and paper box, blister