4-42mm Step Drill Bit Titanium Coated for Wood Metal Hole Cutter High Speed ​​Steel Drilling Bit

Features:
High speed steel material, more durabl-e.
3 sided shanks design to preven-t slippage when in chuck.
Titaniu-m coated to reduce friction and run cooler.
2 flute design drives faster, smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps
Suitable for workpieces, such as wood boards, thin iron plates, copper, aluminum, plastic, etc.