HIGH QUALITY & FAST CUTTINGThe hole saw drill bit cutter blades are carbon steel and heat treated, with black surface, ensure fast cutting, rustproof, wear-resistant and long usage life.
drywall
High-Speed Bi-Metal Hole Saw for Wood & Plywood – Superior
SHARP TEETHThe bi-metallic cutting teeth is layered with high speed steel, that increases their hardness and durability, and gives the hole saw excellent cutting ability to punch a clean hole.