These discs are available in five different grits to take you from removing scratches to a last step before decorative or polishing finishes.Feature: Non-woven construction will conform to the workpiece Produce a uniform brushed finish on metal surfaces Application: Finishing jobs For producing a fine scratch pattern Removing paint Surface cleaning Material: Aluminum Stainless steel Steel Tips:Use with Walter QUICK STEP backing pads Part # Diameter Grade Max RPM Optimal RPM 07-R 452 4-1/2" Coarse 11,000 4,000 to 6,500 07-R 453 4-1/2" Medium 11,000 4,000 to 6,500 07-R 454 4-1/2" Fine 11,000 4,000 to 6,500 07-R 455 4-1/2" Super Fine 11,000 4,000 to 6,500 07-R 502 5" Coarse 11,000 3,000 to 6,500 07-R 503 5" Medium 11,000 3,000 to 6,500 07-R 504 5" Fine 11,000 3,000 to 6,500 07-R 603 6" Medium 8,600 3,000 to 6,500 07-R 604 6" Fine 8,600 3,000 to 6,500 * All Pictures Shown Are For Illustration Purpose Only. Actual Product May Vary Due To Product Enhancement.