Milescraft SandPlane can take the pain out of sanding difficult surfaces, it can handle any shape. It has four interchangeable profiles for sanding: concave, convex, flat surfaces and V-grooves. SandPlane is designed for standard 5” diameter sanding disks, regular disks from any hardware store will do. The sandpaper attaches with Velcro and won't slip off during use. With SandPlane, even the toughest surface will be as smooth as silk. If you often work with wood, do restoration work, or just like everything in your home to be perfectly smooth, the Milescraft SandPlane is definitely for you.