Pilot Step Drill
- Norm:accord with NAS937、NAS965
- Application:Apply in machining special material of aerospace industry.
- Material: in - HSS & Carbide
- coating:DLC or uncoated
- Type:We BW produce aviation pilot drill series, including pilot step drill,pneumatic step drill, and double margin pneumatic step drill, made by high speed steel and carbide with diamond coating material.