Neiko 30264A 5" Velcro Sander Backing Pad, 5/16" - 24 Thread | 5 Vacuum Holes | 10,0000 RPM Backing plate for random orbital and double action sanders with nylon hook surface and 5/16" - 24 UNF thread bolt; rated for 10,000 RPM Five inch sanding plate has velcro faced backing pads to efficiently swap out sanding and polishing discs with the quick-change surface Padded with material that's flexible enough to absorb vibration for increased control while sanding and insulates to minimize heat transfer Five hole discs, compatible with vacuum hole pneumatic sanders for dust extraction while sanding for control, consistent finish Works with widely available abrasive hook and loop discs like foam polishing discs, buffering discs, and air sander discs of various grit