Titanium Aluminum Nitride (TiALN) for extreme heat and wear prevention, not just a decorative coating like most step drills
Two step drills included
The Astro Pneumatic Tool 9442 Blue Steel 2-PieceMax-Duty Step Drill Set is made with Titanium Aluminum Nitride (TiALN) forextreme heat and wear prevention, not just a decorative coating like most stepdrills.