The 3M™ Roloc™ bristle disc holder is a convenient and durable backup pad for attaching and supporting Roloc™ bristle discs during collision repair jobs. Hard rubber construction of the pad holds the disc firmly for smoother, more consistent finishes. The assembly easily accepts 3M™ Roloc™ bristle discs and includes a Roloc™ shank for direct attachment to grinding tools with 1/4 in - 20 TPI EXT threads.