Grinding discs for contoured surfaces Rex-Cut Cut-N-Finish discs are constructed of multiple layers of cotton fiber designed to constantly expose fresh abrasives as they work. Pressed into a waffle pattern that runs cool, a flexible bond easily follows contoured surfaces for the light grinding and blending of MIG and TIG welds on tanks and vessels in one step. Capable of producing a 32 RMS finish on stainless steel and non-loading on aluminum, Cut-N-Finish discs last longer than flap- and resin-fiber discs. The discs come in 4", 4-1/2", and 7" diameter sizes and are available in flexible and medium bonds with A24, A36, A54, and A80 grits. Also suitable for flat surfaces.