Full Circle's Radius360° Drywall Sander Center Hub can be snapped into the new Trigon180° sanding tool or can be interchanged with the hub of the Pro Handle Adapter. (Pro Handle Adapter Sold Separately) The ability to change directions quickly without having to lift the pad off the wall is a huge advantage over the conventional method of sanding drywall. Unlike the conventional pole sander, the foam disc on the Radius360º wears evenly and lasts much longer. Both the foam pad and the sandpaper utilize hook and loop backing, making for easy replacement.