Titanium Plated High Speed Steel (HSS) Drill Bits Set Cutters for Stainless Steel Aluminum Alloy Plastic. 2- Material- Constructed from High Speed Steel (HSS) and titanium coated for added strength, the hole saw combines high hardness, toughness, wear resistance, heat resistance to provide excellent durability, precision and long-lasting performance in a variety of materials and applications.
eBay