Our 3M™ Hookit™ Center Water Feed Disc Hand Pads have a proprietary feed system that dispenses water for wet sanding of plastics, primer surface, paint, fiberglass and other materials. The water flushes residue off of the sanding disc which keeps it from loading. These firm, yellow disks feature 3M™ Hookit™ hook-and-loop attachment surfaces, and are available in both contoured and bullet shapes.