Bi-Metal Hole Saw 120mm, M42 HSS Bi-Metal Hole Saw with Centering Drill Bit for Heavy Duty Applications. Widely used for cutting plasterboard, steel, aluminum, non-ferrous metals, copper, brass, wood, plastic, and PVC. Compatible with bench drills, electromagnetic drills, pistol drills, and impact drills. Professional Hole Saw Material: Made from heat-treated and blackened carbon steel for oil resistance, rust protection, high hardness, toughness, and durability. Sharp cutting edge ensures clean, efficient performance with minimal wear. Precision construction prevents shaking during operation. Intelligent Design: Features a spring-loaded mechanism that enhances chip removal and improves drilling efficiency. Equipped with a hexagonal shank for secure grip and consistent torque transmission. The spring automatically ejects the cut-out disc upon completion for quick, clean results. Features: - Clean, smooth cuts without binding - Silicon carbide coating for enhanced rust resistance - Designed for repeated use, ideal for applications such as installing desk cable grommets - Smooth operation with clean edge finish Specifications: - Material: M42 HSS Steel - Color: Red or Black - Diameter: 120 mm - Contents: 1 x Hole Saw