【Perfect for Holes】: Covers the most popular hole saw sizes on the market. High precision, smooth cutting edges, especially impact resistance and wear resistance. 【Great Woodworking Tool】: With a positioning drill, this circular hole cutter kit can help you cut a hole easily. This hole saw kit can be used with ordinary hand drill, impact drill, charging drill, flat drill and so on. High Quality and Durable: Made of 50# carbon steel - Woodworking circle saw teeth - Sharp and durable. With high-frequency quenching, these wood cutting tools have higher hardness (HRC4-48) and long service life. 【Compatibility】: For wood, plasterboard, plastic, PVC pipe, fiberglass. Please do not try this hole saw on the hard material. Usage: ordinary hand drill, electric drill with chuck. Product Description: Carbon steel hole saw kit for wood, plasterboard, plastic and thin PVC, perfect for hand electric drill, motorized drilling machine and mobile ribbon type magnetic drilling machine. Carbide teeth for fast cutting of clean, round holes, suitable for fast and accurate cutting. Specifications: Material: Carbon steel. Operating depth: 25mm. 13 saw blades diameter: 19mm 22mm 28mm 32mm 38mm 44mm 54mm 64mm 76mm 89mm 102mm 127mm. Tips: When using the hole saws, remember to install the plate that can fix the hole cutter. This point is the most important. These hole saws are not suitable for metal objects (such as steel bars), large density boards, aluminum panels, computer desks, etc. The material to be cut must be fixed and at a right angle to the hole opener at 90 degrees. During operation, if there is any abnormality or the chip removal is not normal, please stop working, and rework after cleaning. The positioning drill and hole opener are easily stuck when punching holes on thicker wooden boards (such as composite plates, compression plates, etc.), so please reduce the speed, otherwise the positioning drill will break. For your safety, please wear protective glasses and gloves when using this hole saw kit. Contents: 13 hole saws. 1 large chuck with universal chuck. 1 small chuck. 1 installation plate. 1 storage box. Notes: Please allow 1-2mm error due to manual measurement. Please make sure you do not mind before ordering.