... coated Helix dril bit, carbide drill, solide carbide drill, carbide drill bit, 1) Our factory specialize in manufacturing all types of cutting & milling tools: Carbide End ... , Twist Drill, Center Drill, Spotting Drill, Saw Blade, Reamer, Side & Face Milling Cutter, T-slot Cutter, Dovetail Cutter, Turning Tool, Countersink, Round Rod, Tool Bit ...