Discover the tool that is convincing everyone – round is better! The Radius 360° is a revolutionary sanding tool, with unique side-to-side, up and down, and circular mobility. Designed to complement the Radius 360°, the FlexEdge system handles a variety of sanding challenges with everything you need to take on corners, tight angles, outlets, bumps, and more. A2 Abrasive Sponge. This sturdy, washable sanding sponge handles tight corners and other close quarters without scuffing nearby surfaces. Built to last for the long haul, the unique angles allow you to cut a neat line every time! Available in medium and fine grit.