Thick and fluffy pads provide superior polishing performance. Fibers effectively act like thousands of tiny planes, ensuring gentle, uniform abrasion. Extra-porous wool traps removed finish and evenly distributes polishing compounds. Ultra-durable, low-carbon steel wool holds up under the most extreme application conditions. Grade #3. Application: Hard Floor; Diameter: 20 in; Color(s): Steel Gray; For Use With: Rotary Floor Machines.