bi-metal-hss-hole-saw
DEWALT POWER-TOOLS Cranean Bi-metal Crowns 73mmWith a double-tooth design for long life and extreme durability, DEWALT Bi-Metal Hole Saws power through 2 times the material in a single pass. A sharp tooth geometry expedites cutting, and thick, hardened backing plates helps to prevent thread stripping. A high-speed steel height makes them ideal for tough jobs.