Quick-release retaining spring prevents roller slippage, yet allows easy, one-rap removal, Smooth-rolling bearings eliminate shank wear and gray streaks,  Durable, green^™ fiberglass-reinforced nylon cage and endcaps,  Chrome-plated 5/16” shank, 90˚ angle,  Full-size polypropylene grip with reinforced threads, Sherlock GT^® compatible.