The and tenon blades work together to remove material within the contour, and the preset depth allows for quick and precise flush fit. This door lock installation tool helps you remove the material needed for door lock installation, achieving a precise flush fit. It's easy to use, significantly reducing installation time and the number of tools required. The tool body is thick and sturdy, highly impact-; both the contour and tenon blades are made of stainless steel with coating, ensuring edges. This tool is an essential for every home, making door lock installation easy and convenient! The guide head of the tool inserts into a 1-inch door edge hole, and the contour blade automatically positions itself, precisely outlining the lock's contour without manual cutting. Whether you have experience or not, you can easily install door locks with this tool. It also makes an excellent everyday gift., Weight: 0.220462262 pounds, Manufacturer: Ehwisbe