The key element in our Jumbo-Koter program, these frames have our exclusive, easy-roll cage. The cage is engineered to spin freely every time, so it won't “skid” up the wall. All Jumbo-Koter frames work with both 6-1/2” and 4 1/2” Jumbo-Koter covers. 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 minirollers; and Prep Crew surface prep tools. You can feel confident knowing Wooster is the name behind your painting tools.