PORTER-CABLE 97455 5-Inch Random Orbit Sander with Dust Collection 4.5 Amp, AC only Electronic variable-speed dial 2,500-6,800 OPM Random orbit, swirl-free sanding/polishing action Includes 5-inch proprietary counter balance for use with 5-inch sanding/polishing pad Accepts 5/16 - 24 spindle thread accessories Features two-position (left or right) removable side handle for greater comfort and control