3M(TM) Random Orbital Sander 20324, Non-Vacuum, 6" Tool Diameter x 5/16" Orbit Diameter (Pack of 1) Powerful 0.28 hp motor provides professional performance for all sanding and finishing applications Precision balanced motor operates smoothly for greater comfort and control Low-profile, balanced design optimizes the performance of 3M abrasives Pneumatic power exceeds the capability of standard electric sanders, supplying hours of continual use Aluminum body and durable composite cover reduce cracked housings and downtime