Oscillating Spindle Sander Model 50-320 is a specialized sander for the fast and accurate sanding of curved board edges. Abrasive sleeves mounted on the machine's spindles oscillate up-and-down 5/8”, 58 time per minute while the spindle spins, providing more efficient abrasive cutting action. Powerful 1/2 HP motor, ample cast metal table and 6 spindle diameters (1/2” to 3”) with 6 table inserts make this a valuable machine for every shop. Includes 4-1/2” long 80 grit abrasives.