- Back-up pad provides extra support to a right angle grinder, enabling the use of heavier pressure when sanding
- Works with 9" diameter Norton A290 hook-and-loop discs for Porter Cable drywall sander, model 7800 (sold separately)
- Hook-and-loop abrasive discs can be removed and reattached multiple times with no loss of adhesion, which can increase abrasive disc life
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