3M roloc disc pad tr 45091 3in – 1/4-20 int 3M roloc disc pad optimizes the performance of our roloc discs and bristle discs by providing the right backup system and a secure attachment for grinding applications. Plus it saves time by eliminating the need to align edges of the disc with the disc padthe screw aligns the disc, making disc changes quick and easy. The level of hardness needed is dependent on the taskchoose a higher density for more aggressive applications and a lower, more flexible density for less aggressive applicationsand is also dependent on the users work style. We designed these disc pads to be used with any drill, disc sander, right angle grinder, or rotary sander. Max rpm is determined by size and firmness of the disc and disc pad. Our 3M roloc disc pad is available for use with the following roloc attachment systems: tr, tp and ts. Please select discs with the attachment design made for your system. Applications are power tools, accessories, compounds, specialties. Industries include builders hardware, medical instruments, metal fabrication, metal implants, plating & polishing, plumbing fixtures, turbine engines.