Several electrician's kits providing an assortment of the most commonly used Greenlee variable pitch hole saw sizes and arbors|Cuts through steel, tin, aluminum, fiberglass, wood and plastic|Hole saw with 1-5/8 in cutting depth allowing cutting on 2 x 4 studs|Extra thick backplate minimizes vibration for smoother, easier, less tiring cutting|Extra tough bi-metal blade made of highest grade tool steel|Steam oxide finish for cooler running saw