5” Hook & Loop hand sanding block that you can’t do without! Hook and loop function for quick pad changes prevents pad shifting and spinning, yet allows for easy removal of the abrasive disc without wearing out overall strength. The backing plate is made of polyurethane(PU), flexible and very durable, to dampen the vibration, and Minimizes heat transfer. Easy to hold handle and a flat bottom. Very comfortable to use and helps with those harder to get at places like the edges.