Dynabrade 56826 6-Inch Non-Vacuum Dynorbital Supreme Random Orbital Sander, Black Non-Vacuum Dynorbital Supreme includes low profile, premium urethane weight-mated sanding pad Rotor utilizes five blades and produces more useable power Composite rotor is stronger and has better lubricating qualities Composite base has integrated rubber over-mold creating a non-slip feel, as well as insulating from cold Triple-sealed front double row balancer bearing (Patent No 4,854,085) is guarded from sanding residue for long life and lower maintenance Comfort Platform provides additional hand and wrist support, further enhancing operator comfort