... carbide 3)Finish:titanium coated Helix dril bit, carbide drill, solide carbide drill, carbide drill bit, 1) Our factory specialize in manufacturing all ... Countersink, Round Rod, Tool Bit, Carbide Tip, Ejector Pin, Punch, Mold Etc.2) Super high hardness and precision, extreme smooth ... (good anti-sticky).4) Longer tool life, super high wear resistant and impact-resistant application.5) Work piece ...