"RESIN BONDED; USES X-WEIGHT CLOTH BACKING; NO TOOLS OR ADHESIVES REQUIRED TO SECURE TO DISC HOLDER; USES 3M ROLOC AND NORTON SPEEDLOK TR STYLE, P/N 46465A72, PLASTIC ROLL-ON DISC FASTENER OR MERIT POWER-LOCK STYLE, P/N 47045A82, PLASTIC SNAP-ON DISC FASTENER; CAN BE USED FOR WET OR DRY SANDING APPLICATIONS"