Wooster, Sherlock, Cage Roller Frame, Quick Release Spring Prevents Roller Slippage, Yet Allows Easy 1 Rap Removal, Smooth Bearings Eliminate Graying & Shank Wear, Durable Green Fiberglass Reinforced Nylon Cage & Endcaps, Chrome Plated 5/16" Shank, Polypropylene Grip With Reinforced Threads.