Packaging: M42 bimetallic hole opener. Diameter 110mm, depth 34mm, handle diameter 10mm, center drill 6 * 68mm. Material structure: high-speed steel; Ultra high hardness, high cost-effectiveness, high performance and quality assurance, not easy to break, serrated hardening, long wear resistance, and long service life. Detailed features: sharp tooth shape, low vibration, fast balance when opening holes, and more stable operation; The front and rear inclined tooth shape design has a fast cutting speed, and compared with ordinary equal hole saws, it is not easy to jam or pull teeth. Convenient and practical: suitable for most tools such as hand drills, table drills, and rechargeable drills. The handle design can effectively play a role in anti slip and stability. Widely used: suitable for piercing metal profiles such as sheet metal, cast iron, aluminum alloy, gypsum board, wooden board, plastic, synthetic resin, etc. Delivery scope: 1 x M42 bimetallic hole opener