1、Adjustable Diameter: This circular punch saw is available in a variety of adjustable diameters ranging from 45 to130mm, makes it possible to cut holes of different diameters with just one tool, suitable for a variety of drilling scenarios. 2、Cutting Blades: 3 triple tooth blades saw through plasterboard and softwood boards with ease, and ensure fine and clean cuts with their special, straight set toothing. Triple blade design, straight round effect, slip cut, and burr free. 3、High Efficiency: The circular hole opener hole saw knife kit is equipped with a positioning drill to saw out standard circular holes, only one drill bit is needed for round holes of different sizes and diameters. 4、Nylon And Zinc Aluminum Alloy Material: The adjustable hole saw is made of nylon and zinc aluminum alloy material, which is durable, wear proof and can be used for a long time. 5、Multiple Use: With a cutting depth of up to 30mm, this adjustable punching saw is ideal for furniture repairs and woodworking projects.