Diablo, 2-3/4", carbide tipped hole saw, cuts both wood & metal wood, nail embedded wood, plastic, aluminum, metal, cast iron, stainless steel & metal, delivers longer cutting life than bi-metal for faster cutting performance & increased productivity, 2-3/8", 60mm cutting depth for 40% deeper holes in single pass & increased productivity, variable tooth design for faster cuts, snap lock plus mandrel system for quick & easy changes with no down time includes mandrel, pilot bit, 5/8" threaded adapter fits diameters 1-1/4" to 6" & 1/2" threaded adapter, fits diameters 9/16" to 3-1/16", 1 size fits all" mandrel fits all diablo holes saws in the carbide & bi-metal range, from 5/8" to 6" diameter, tool free plug ejection for fast material removal.