The Medium Coarseness Red 1” x 1” x 1/4” Mounted Interleaf Flap Wheel by Black Hawk Abrasives are the perfect abrasive for light sanding and deburing while simultaneous polishing in small pipes, tubing, or in other compact, irregular surfaces. These 1 inch flapper wheels are designed with alternating red non-woven abrasive pads and aluminum oxide sanding sheets in a fan-like pattern around a center shank. This allows for some light sanding while polishing and provides some flexibility in tight corners and crevices. Use the 1" red interleaf flap wheel on a drill or die grinder.