HSS Variable Built-IN Deep Cut Hole Saws are designed to cut holes in wood, plastic, or any machinable material. For locksmiths, remodeling, and general contractors. Cuts through 2â€ x 4â€s, joists and most doors in one pass with extra clearance. Features a 1-7/8â€ cutting depth, attached arbor, M3 cutting edge, and a 4/6 variable pitch. Saves time, longer life and smoother cuts.