Orbital Action. Versatile. Adapts to all functions from heavy duty to finishing. Excellent for leveling or planing with over 45 square inches of full contact sanding enforced by 5-point suspension system and Hutchins powerful, Air-Efficient motor. Health and safety benefits in VA/DF options enhance operator skills. Pad Size 2 3/4" X 16 1/2" Optional Pierce Plate available Separately.