Helix drill bit,solide carbide drill 1)Cutting tool,metal material 2)Material:HSS ,solide carbide 3)Finish:titanium coated Helix ... Milling Cutter, T-slot Cutter, Dovetail Cutter, Turning Tool, Countersink, Round Rod, Tool Bit, Carbide Tip, Ejector Pin, Punch, Mold Etc ... .2) Super high hardness and precision, extreme smooth coating surface ...