You can get more work done in less time by using a Century Drill & Tool Hole Saw. Fit for the task, the bi-metal hole saw set cuts up to 1-7/8 in. deep holes on a 3/8 in. attached arbor to help your work just fly by! The blade is made with cobalt high-speed steel teeth electron welded to a shatterproof, shock-absorbing alloy body. No one likes overspending on tools to make other tools work, so this hole saw can be used in portable electric drill machines, lathes, and milling machines. It even cuts clean through stainless steel, brass, aluminum pipe, steel nail, embedded wood, hardwood, plywood, sheet metal, fiberglass, and plastic!