ROLLER FRAME 9" SHERLOCK R017-9 | Quick-release spring prevents roller slippage, yet allows easy, one-rap removal. Smooth-rolling internal bearings eliminate shank wear and gray streaks. Durable, green fiberglass-reinforced nylon cage and endcaps. Chrome-plated 5/16 in shank, 90 deg angle. Full-size polypropylene grip with reinforced threads, SHERLOCK GT Compatible.