3M flange adapter holds together a minimum of seven 6 in radial bristle discs for use on bench motors with a shaft size of 1 in Dia. For bench motors with shafts smaller than 1 in, a 3M telescoping wheel flange adapter (PN 5) can be inserted into the center hole to fit 1/2 in, 5/8 in, 3/4 in or 7/8 in shafts. When a greater thickness of bristle discs is needed, 3M spindle extender adapters (PN 30134) can be added to increase the disc capacity of the flange adapter. These additional adapters are sold separately.