Package Includes : KATA hole saw kit includes 13pcs saw blades, 3/4 (19mm), 7/8 (22mm), 1-1/8 (29mm), 1-1/4 (32mm), 1-1/2 (38mm), 1-3/4 (44mm), 2 (51mm), 2-1/2 (64mm), 3 (76mm), 3-1/2 (89mm), 4 (102mm), 5 (127mm), 6(152mm), 2 mandrels, 3 drill bits, 1 hex key, 1 installation plate.High and Professional Quality : Made of premium heat treated carbon steel,black coating with oil, rust-proof and wear-resistant, very easy to put together the set with the drill, ultra sharp serrations for high-performance, faster and cleaner cutting.Wide Application : Upgraded design with ultra sharp serrations for faster and cleaner cutting, which is ideal for softwood, plywood, plastic plate, plasterboard and thin PVC board.Great for tasks of cutting multiple hole sizes from small to large in desk surfaces, doors and furniture.Solid Storage Case : The set comes with a customized heavy duty case for portability. Designated slots in the case keep every piece in place. Improve work efficiency.Warmly Tips : Can be used with a standard electric drill, impact drill, If you need very precise holes, please use a saw machine, not suit for hard metal, hard wood or density board. Not for use for cutting depths beyond about 1(25mm).