"Ideal for surface polishing after compounding 4 diameter is excellent for polishing in tight spaces or small areas after compounding Specially designed foam face holds polish, prevents slinging for faster, cleaner results Fits all 3 Hookit back-up pads Reverse taper protects backing pad edge, helping reduce damage to finish Single-sided foam pads work with variety of polishers Hookit attachment makes for fast change-outs Part of the 3M Perfect-It Paint Finishing System for showroom finishes" 3M Perfect-It Foam Polishing Pad, 30042, 4 in, Single Sided, 2 pads per bag, 6 bags per case 3M Perfect-It Foam Polishing Pad helps refine compounding swirls on automotive paint finishes. Single-sided pad features a 4-in. diameter for control and access in small areas or tight spaces. A specially designed foam pad face holds polish and helps prevent slinging. Pads feature insets for easy centering on rotary polishers, and Hookit hook-and-loop attachment for easy pad change-outs.