Features High Positioning Accuracy: Achieve precise drilling without movement, ensuring clean hinge installations with automatic chip discharge for hassle-free operation Durable Aluminum Alloy Construction: Crafted from robust aluminum alloy, this hinge drill bit guarantees long-lasting performance and reliability for all your woodworking needs User-Friendly Design: Simple structure makes it easy to operate and install, allowing you to tackle projects quickly with the included various drill bit specifications Versatile Application: Ideal for woodworking projects, this tool is perfect for installing door and window hinges, streamlining your workflow with effective chip removal Hex Handle for Enhanced Grip: Features a hex handle with an incisive bit, providing superior control and extending the life of your hardware tools for consistent results Features: 1、The main body is made of cemented carbide, which effectively extends the service life. 2、Compatible with a variety of materials, work more efficiently, can be used for steel plate, stainl steel, resin plate, FRP plate hole opener. 3、The cutting edge is sharping, the opening is neat and smoothly without broken edges, and the cutting resistance is small. 4、Front and back angle tooth design, low resistance and strong perforation ability. 5、Not suitable for hand drills and impact drills, as well as ceramic tiles, concrete, wall, stone and other materials. Specification: Item Type: Carbide Hole Saw Drill Bit Material: Carbide Purpose: Steel plate iron plate, stainl steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP plate opening, etc. Plate Cutting Thickn: Approx. m / 0.1in Total Length: Approx. 88mm / 3.5in Inner Wall Thickn: Approx. 20mm / 0.8in Shank Diameter: φApprox. 9.8mm / 0.4in Hole Diameter Specification: φApprox. 40mm / 1.6in 42mm / 1.7in 45mm / 1.8in 48mm / 1.9in Package List: 1 x Hole Saw Drill Bit 1 x Spring 1 x Hex Wrench Note: Not suitable for hand drills and impact drills, as well as ceramic tiles, concrete, wall, stone and other materials. Package List 1 x Hole Saw Drill Bit 1 x Spring 1 x Hex Wrench