The Nicholson SandShark technology is a revolutionary concept for material removal, allowing up to 25 times faster removal than coarse (60 grit) sandpaper. SandSharks produce a surface smooth enough to paint and sand. The teeth are specially heat hardened and sharpened to cut easily through the hardest material and keep their edge intact. Moreover, SandShark units have a tooth pattern that resists clogging. They can be easily cleaned with a standard household brush and can be repeatedly used.