Dynabrade 56850 5-Inch Non-Vacuum Dynorbital Supreme Random Orbital Sander, Black Non-Vacuum Dynorbital Supreme includes low profile, premium urethane weight-mated sanding pad Dynorbital Supreme models run at 12,000 RPM Rotor utilizes five blades and produces more useable power 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; easy replacement using 57098 Repair Kit Comfort Platform provides additional hand and wrist support Also offers increased protection against cold air exhaust