PORTER-CABLE 7346SP 6-Inch Random Orbit Sander with Polishing Pad 4.5 Amp, ac Only Electronic variable-speed dial 2,500-6,800 OPM Random orbit, swirl-free sanding/polishing action Includes 6-inch proprietary counter balance for use with 6-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 Random orbit, swirl-free sanding/polishing action B All and roller bearing construction Compact and lightweight design Electronic variable-speed dial Proprietary counter balance