DEWALT D180001 Standard Plumbers Bi-Metal Hole Saw Kit Contains the most commonly used sizes Hole saw kits include new quick-change mandrels (DW1803 and DW1810) for increased user productivity Hole saw kits include replacement parts (including two additional Pilot Point centering bits) for increased user value Three trade specific configurations contain the most commonly used sizes Door lock kit utilizes C-clamp design with tool-free clamping and no surface damage