Diablo, 1-3/4", carbide tipped hole saw, cuts 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 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.