Merit Abrasives Sand-O-Flex 350-RP Coated Flap Wheels High impact plastic body for good durability. 1 in wide abrasive strips backed by 8 cushioning brushes for good conformability. Refills are available both scored (for finer, less aggressive work) and unscored. Fit most electric drill and bench grinders. RPM will accommodate most electric drills Pack of 1