For use with roller covers that do not include end caps. Works with our BR047and BR036 Wide Boys and BR045 Big Ben and Little Ben frames. The Wooster Brush Company has been manufacturing innovative, high-performance painting tools right out of Wooster, Ohio USA since 1851. Our trade names include Ultra/Pro, Advantage, Yachtsman, Shortcut paintbrushes; Super/Fab, Super Doo-Z roller covers; Sherlock frames and extension poles; Jumbo-Koter mini rollers; and Prep Crew surface prep tools. You can feel confident knowing Wooster is the name behind your painting tools.