This kit utilizes a flexible pad in between the hard back up pad and sanding disc to create a flexible sanding surface. This set-up is especially useful for carving, shaping, intarsia and sanding rounded edges. Can be mounted on motor, on the end of one of our 24" or 30" Sanders or in a hand drill. Includes keyless chuck (for either 1/2" or 5/8" shaft), 6" Back up pad, 6" flex Pad, and 5, 6" discs in assorted grits.