Hole Saw, Carbide Tipped, 1-1/4 x 2-3/8-In.Diablo, 1 1 4" x 2 3 8", carbide tipped hole saw, cut both wood & metal, use on wood, nail embedded wood, plastic, aluminum, metal, cast iron, metal & stainless steel, delivers longer cutting life than bi metal for faster cutting performance & increased productivity, 2 3 8" cutting depth for 40 percent deeper holes in single pass & increased productivity, variable tooth design for faster cuts, snap lock plus mandrel system for quick & easy changes