IDT1672 Features: * Bi-metal hole saw * Professional grade * Cobalt high speed steel teeth resist heat and wear * Variable pitch tooth pattern cuts clean through Stainless Steel, brass, aluminum, pipe steel, nail embedded wood, hardwood, plywood, sheet metal and fiberglass * 5/8""-18 Thread fits mountain "B" arbors Dimensions: * Cuts 1-1/2"" deep holes * Dimensions: 3.25"" H x 5.25"" W x 7.5"" D Warranty: * Lifetime warranty does not cover abuse