WHAT YOU WILL GET: 1 x Bi-metal hole saw blade, 1 x chuck, 1 x drill bit, 1 x storage box. Each hole saw kit is individually packaged. Diameter: 40mm. Maximum cutting depth: 25mm. HIGH PERFORMANCE: The hole saw features an M42 bi-metal band construction with thermal processing. The cutting portion is made of high-quality high-speed carbon steel, offering high temperature resistance, minimal deformation, and extended service life. CUTTING DESIGN: The saw teeth feature an arc design with precise concentricity, uniform tooth edges, impact resistance, and anti-drop properties. The hole saw kit includes a non-binding sharp edge design for smooth cutting. After drilling, the spring mechanism automatically ejects the core. WIDE APPLICATION: Suitable for use on metal pipes, steel, castings, metal alloys, aluminum, plastic sheets, galvanized pipes, fire-fighting pipes, wood, plasterboard, and similar materials. Compatible with bench drills, pillar drills, hand drills, and other standard drilling equipment. NOTE: When using the hole saw kit for extended periods, maintain an appropriate rotational speed. Excessive speed (above 1000 RPM) may lead to accelerated wear. The product surface has a thin protective oil coating for anti-oxidation and rust prevention. Avoid contact with skin and wipe off if touched. Inspect the 40mm hole saw before use. SPECIFICATIONS: Material: M42 HSS steel Cutting depth: ~25mm Total bit length: ~80100mm NOTE: 1. Requires an electric drill for operation (drill not included). 2. Avoid skipping teeth during use to prevent damage to the material surface. PACKAGE INCLUDES: 1 x 40mm Hole Saw Set