A hole saw is a tool that allows you to cut through tough materials such as plastic, wood, steel, stainless steel, plywood, dry wall, cement boards, and even cast iron. It is the perfect tool for you to use when you have to cut through such materials in your house. Variable pitch teeth allow for cutting thru any wood, metal or plastic. Can be used in a wide variety of applications. HSS Bi metal hole saw kit comes in plastic case and contains the most used hole saws for pipe and entrance holes. Bi-Metal Hole Saws, Supports heavy duty cutting with its rugged constitution, which is constructed on tough metal. It needs just one pass to cut through studs. It cuts faster, smoother without as much vibration as the others due to its variable pitch teeth. Includes 2 arbors and 1 pilot drill.