Backing Pad with Quick-Lock. Suitable for use with 0.87” Iridium SR abrasive discs and pneumatic spot repair tools: Mirka® MROS150, Mirka® MROS125, Mirka® MAOS130, and cordless Mirka® AOS130-B and Mirka® AROS150-B sanders. The small size allows access to hard-to-reach areas and keeps repairs as small as possible. Fast peel & stick disc change.