FIT FOR HAND:Mouse hand sanding pad and round sanding pad both fit your hands. Sanding mouse is designed with velcro on both sides as well which is meant for sanding 90-degree vertical corners, maximizing the use of each piece of sandpaper HOOK & LOOP DESIGN:Hook and loop sanding block provides quick pad changes, prevents pad shifting and spinning, yet allows easy removal of the abrasive disc without wearing out overall strength. Easy to hold handle and a flat bottom PREMIUM PU BACKING PLATE:Hand sander block's backing plate is made of selected polyurethane(PU), flexible and durable, dampening the vibration STANDARD SIZE:5 inch hand sanding pad works with ANY standard 5 inch sander discs in the market. Say goodbye to such "incompatible/unmatchable" issues APPLICATION:Hand sanding block hook and loop is available for both wet and dry sanding, ideal for woodworking, hobby, arts and crafts, auto body, drywall, shop and automotive use