Professional power tool-12 pcs hole saw kit | hole saw cutting set 12pc holesaw kit circle wood / timber cutter round plaster hole saw 19-64mm. All the products in this kit are made of #50 premium carbon steel and processed with high frequency heat treatment. Suitable for drilling large holes on soft wood, timber, plasterboard, but can not be used to open the sheet metal and stone. This product is used for general common hand drill , easy to operate. Hardened saw teeth are good for accurate and easy cut with the use of electric. After use, apply a small amount of anti-rust oil on the surface of the hole to avoid the natural oxidation, can increase its service life. Package included: 8 x drill bits: 3/4″ (19mm) 7/8″ (22mm) 1 1/8″ (28mm) 1 1/4″ (32mm) 1 1/2″ (38mm) 1 3/4″ (44mm) 2″ (51mm) 2 1/2″ (64mm) 2 x mandrel 1 x drive plate 1 x 2.5mm allen key features: hole saw kit for drilling round holes easily and quickly. Sharp and durable teeth of hole saw ensure a powerful and high efficient action. Hole saws in various size to meet different needs. Come with arbors and a little wrench. Can be widely used for cutting wood, thin metal plate. Specifications: material: carbon steel arbor length: 4cm / 9cm package size: 29x14x6 package weight: 455gm.