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 part of the hole opener is made of hard alloy, which can effectively extend the service life and increase the work efficiency. 2、The cutting edge is sharp, the opening is neat, smooth, without broke edges, and the cutting resistance is small. 3、The front and rear inclined tooth？shaped design has low resistance and strong perforation ability. 4、Wide range of applications and can be used to open holes in steel plate, iron plate, stainl steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP plate. 5、Profional manufacturing, superb craftsmanship and high accuracy help to provide the best performance. Specification: Item Type: Hole Saw Cutter Material: Hard Alloy Purpose: Can be used to open holes for steel plate, iron plate, stainl steel, aluminum plate, calcium silicate plate, plastic plate, resin plate, FRP plate. Plate Cutting Thickn: Approx. m/0.1in Total Length: Approx. 88mm/3.5in Inner Wall Thickn: Approx. 20mm/0.8in Shank Diameter: Approx. 9.8mm/0.4in Package List: 2 x Hole Saw Cutter 2 x Spring 2 x Hex Wrench Note: Not suitable for hand drills and impact drills, as well as ceramic tiles, concrete, walls, stone and other materials. Package List 2 x Hole Saw Cutter 2 x Spring 2 x Hex Wrench