BB Step Drill 90 Degree 180 CNC Precision Solid Carbide Drilling Tools DLC Coated Screw Hole Hole Diameter:5.0x6xD8x10x60 Fully Ground Cutting Edge Smooth

Fully Ground Cutting Edge Smooth Cutting Wear-Resistant and Durable

3 D4 16  50  4T 4  1

using special steel lattice mixed processing

full cutting should be avoided as much as possible

5 D4 12  75  3T 3R0

BB Step Drill 90 Degree 180 CNC Precision Solid Carbide Drilling Tools DLC Coated Screw Hole Hole Diameter:5.0x6xD8x10x60 Fully Ground Cutting Edge SmoothExample 1x5xD4x10x50 d=1mm, L1=5mm,D2=4mm,L2=10mm,Overall Length=50mm Once 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 Nano Diamond Coating Enhance tool hardness and service life, improve machine tool productivity,