Dynabrade 56830 6-Inch Central Vacuum Dynorbital Supreme Random Orbital Sander, Black Central Vacuum Dynorbital Supreme includes low profile, premium urethane weight-mated sanding pad Dynorbital Supreme models run at 12,000 RPM Composite base has integrated rubber over-mold creating a non-slip feel Triple-sealed front double row balancer bearing (Patent No 4,854,085) is guarded from sanding residue for long life and lower maintenance Anti-clog design (Patent No 5,319,888) enhances the vacuum pick-up on central vacuum models