"Packaging: M42 bimetallic hole opener.Diameter: 110mm, depth 34mm, shank diameter 10mm, center drill: 6 * 68 mm.StrucMaterial: high speed steel; ultra-high hardness, high cost performance, high performance and quality assurance, not easy to break, hardened serrations, long wear resistance and long service life.Detailed features: pointed tooth shape, low vibration, quick balance when opening holes, making the operation more stable; Forward and backward sloping tooth shape design, fast cutting speed, compared with ordinary even-tooth hole saws, it is not easy to jam or pull the teeth.Convenient and Convenient: It can fit most tools, such as hand drills, bench drills, rechargeable drills, etc. The handle design can effectively play the role of anti-slip and stability.Wide range of uses: it is suitable for punching metal profiles such as sheet iron, cast iron, aluminum alloy, gypsum board , wood panels, plastic, synthetic resin, etc. Product Description Material: high speed steel Size: diameter approx: 110mm depth approx: 34 mm shank diameter approx: 10 mm central drill approx: 6*68mm Color: show as picture. Feature: Detailed Features: Pointed tooth shape, low vibration, quick balance when opening holes, making the operation more stable; Forward and backward sloping tooth shape design, fast cutting speed, compared with ordinary even-tooth hole saws, it is not easy to jam or pull the teeth. Convenient and practical: it can fit most tools, such as hand drills, bench drills, rechargeable drills, etc. The handle design can effectively play the role of anti-slip and stability. Wide range of uses: it is suitable for punching metal profiles such as sheet iron, cast iron, alloy aluminum, plasterboard, wood panel, plastic, synthetic resin, etc. Note: 1, it is not recommended to drill steel plates for bimetal hole openers, and it is prohibited to drill tempered glass. 2, when using, you can drill holes while adding l water to improve the service life of the hole opener and prevent the product from breaking. 3, Due to manual measurement, please allow a slight deviation of 1-2cm. 4, Due to the different monitors, there may be a slight color difference between the picture and the actual product, please refer to the actual product. Scope of delivery: 1 x bimetallic hole opener M42