Best-selling professional roller frame in the world! Quick-release spring prevents roller from slipping, yet allows clean and easy "hands free" removal. Fiberglass-reinforced nylon cage withstands the force of cover removal. Internal bearings eliminate shank wear and provide super-smooth rolling action. Comfortable full-size grip, threaded for all extension poles, including no-twist Wooster Sherlock GT. See the manufacturer's video with tips from an engineer who designed the frame at www.woosterbrush.com/PaintingTips/Videos. The Wooster Brush Company has been manufacturing innovative, high-performance painting products right out of Wooster, Ohio USA since 1851. You can feel confident knowing Wooster is the name behind your tools.