Bi-Metal Hole Saw 120mm, M42 HSS Bi-Metal Hole Saw with Centering Drill Bit for Heavy Duty Drilling. Widely used in plasterboard, steel, aluminum, non-ferrous metals, copper, brass, wood, plastic, and PVC. Suitable for bench drill, electromagnetic drill, pistol drill, impact drill, and other power tools.Professional Hole Saw Material: Our circular drill bit is made of heat-treated and blackened carbon steel. Offers oil-resistant and rust-proof performance, high hardness, good toughness, and long durability. Sharp blade ensures clean cutting, efficient chip removal, and stable operation without shaking.Intelligent Design: Features a spring-loaded design to enhance chip removal and drilling efficiency. Equipped with a hexagonal shank for secure grip and reduced slippage. Clean edge design delivers smooth and precise cuts. The spring automatically ejects the core after drilling for faster workflow.Features:- Clean edges without binding, enabling smooth and fast cutting- Silicon carbide coating improves rust resistance- Designed for repeated use; ideal for applications such as installing desk cable grommetsSpecifications:- Material: M42 HSS Steel- Color: Red or Black- Diameter: 120 mm- Contents: 1 x Hole Saw