Backup Pad - This uniquely constructed compounding/polishing pad system provides quick change advantages while producing exceptional finishes on gelcoat and paint systems. The 3M™ Hookit™ SBS™ System is designed to provide easy attachment, removal and accurate centering of the 3M™ Hookit™ SBS™ Compounding or Polishing Pad to the 3M™ Hookit™ SBS™ Backup Pad. Polishing and Buffing pads not included.