Sand-O-Flex Resin Bond Refills, 6 1/2 in, 60 Grit, 1/4 in Thick, Scored

Abrasive strips backed by eight cushioning brushes for good conformability
Refills are available both scored (for finer, less aggressive work) and unscored
Load quickly and easily by turning the index knob as needed, allowing you to change grit size in minutes
Fit most electric drill and bench grinders
RPM will accommodate most electric drills