Wooster Brush RR013 Jumbo-Koter Frame, 12-Inch Solvent-resistant plastic cage, extra-smooth rolling action Chrome-plated 1/4 inch shank, 90 degree angle Full-size polypropylene grip with reinforced threads Works with both 4 1/2 in. and 6 1/2 in. Jumbo-Koter rollers Sherlock GT compatible