This Starrett Holesaw Kit is ideal for cutting stainless and mild steel sheeting, plasterboard, wood and thin plastics. The holesaws are constructed from heat-resistant, hardened steel with constant pitch teeth for exceptionally smooth cuts. Completely assembled ready for use. A safety stop collar at the base of the holesaw prevents travel beyond the holesaw depth. Supplied in a plastic carry case with the following sizes: 20, 25 and 32mm.Additional Information:• Material: Bi-Metal• Pitch: Constant Features and Benefits • Integrated hex shank arbors • Optimised for cordless tools • Requires less energy and saves battery power • Safety stop prevents drilling beyond maximum cutting depth • Ejector spring for automatic waste removal • Smooth cut • Each hole saw is supplied complete with an arbor and pilot drill • Packaged in a plastic transport case • Will cut steel, stainless steel, wood and plastic Contents • 20mm Hole Saw • 25mm Hole Saw • 32mm Hole Saw • Plastic Carry Case