3D Carbide Drill Internal Coolant CNC Drilling 3.4mm to 20mm for Stainless Steel

3xD Solid Carbide Drill Internal Coolant CNC Drilling Bit 3.4mm to 20mm For Hardened Steel – High Carbon Steel – Stainless Steel – Alloy Steel. Solid Carbide Drill Bit 3mm-20mm Twist Drill Bit CNC Lathe Drilling Tools Metalworking Bits. Drilling hole diameter:3.4mm to 20.0mm 5. Suit for machining copper, steel, cast iron, stainless steel, mold steel, high speed steel, bearing steel, etc. Drilling hole diameter from 3.4mm to 20.00mm are available. For other diameter which is not listed, please remark the diameter before order placed. Any questions, feel free to contact?