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. 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. 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, 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. Features: Clean edges without binding that can be cut smooth and fast. Silicon carbide coating surface treatment to improve rust resistance. Designed for repeated use and convenient for working on desk cable inserts (plastic desk grommets). Specifications: Material: M42 HSS steel. Color: RedorBlack Diameter: 120 mm Contents: 1 * Hole Saw.