1/4 Sheet Finish Sander, Precision Engineered All Ball Bearing Construction For Reduced Vibration & Noise, Contoured, Rubberized Palm Grip Design For Improved Operator Comfort & Control, Large & Easy To Use Paper Clamps For Fast & Efficient Paper Installation, Efficient Through The Pad Dust Collection System For A Cleaner Work Environment, Conveniently Located On/Off Switch For Easy 1 Handed Operation, Rubber Sealed Switch Prevents Dust Contamination For Longer Tool Life.