Rugsaver Brush Speed Control – If you have expensive rugs, new rugs, or antique or delicate rugs, the patent pending Rugsaver Technology lets you slow down the roller brush from 4500 to 1500 RPM's - a gentle cleaning to protect your delicate fibers. Plus, the Rugsaver lets you gently vacuum the edge on your carpets without sucking the delicate fringe into the vacuum.