BB Step Drill 90 Degree for Steel CNC Precision Solid Carbide Drilling Tools Coated Screw Hole BB2055 spiral-flute 2 D4 4 50 3T

2 D4 4  50  3T 1

Note: Not suitable for low-speed machines such as bench drills

using special steel lattice mixed processing

this tool consistently delivers workpieces with a high-quality surface finish

BB Step Drill 90 Degree for Steel CNC Precision Solid Carbide Drilling Tools Coated Screw Hole BB2055 spiral-flute 2 D4 4 50 3TOnce Formed Drilling + Chamfering The blade edge is sharp without burrs, easy chamfering Greatly improves work efficiency. Solid Carbide Bars High Hardness High Wear Resistance A specialized tool for high hardness and high speed cutting applications with higher wear resistance and strength Blade Nano Diamond Coating Aluminum Processing Strong Thermal Insulation Coating Nano Crystal Strong and Tough Base Film Enhance tool hardness and service life,