Bi-Metal Hole Saw 120mm, M42 HSS Bi-Metal Hole Saw with Centering Drill Bit for Heavy Duty Drill Bit Guazhni Widely Used The hole saw is widely used in plasterboard, steel, aluminum, non-ferrous metals, copper, brass, wood, plastic and PVC and other materials. Suitable for bench drill, electromagnetic drill, pistol drill, impact drill, etc.<br> Professional Hole Saw Material Our circular drill bit is made of heat-treated and blackened carbon steel. It has oil-resistant and rust-proof functions, high hardness, good toughness and durability. Sharp blade, high hardness, wear during operation, chip and reliable. Metal hole cutter with precision without shaking.<br> Intelligent Design The hole saws for cutting circular holes use a spring-loaded design that promotes chip removal, the drilling efficiency is higher, with a hexagonal handle, closes firmly. With the clean edge design,<br> this hole saw kit is smooth and easy. The spring on the drill automatically pushes the disc out of the saw immediately after completing the hole.<br> Features:<br> Clean edges without binding that can be cut smooth and fast.<br> Silicon carbide coating surface treatment to improve rust resistance.<br> Designed for repeated use and convenient for working on desk cable inserts (plastic desk grommets).<br> Specifications:<br> Material: M42 HSS steel.<br> Color: RedorBlack<br> Diameter: 120 mm<br> Contents: 1 * Hole Saw.