THE KIT INCLUDES AN 18-INCH MAIN HANDLE AND AN 18-INCH COVER. 18-INCH ROLLERS REQUIRE AN 18-INCH TRAY. For larger jobs, painters can convert their BetterGrip Paint Roller into an 18-inch frame, by simply replacing the main handle. Since the 18-inch handle adapter uses the same two arms and extension handle that comes in any BetterGrip Paint Roller kit, an additional purchase is required. The 18-inch frame offers the same benefits found with any BetterGrip Paint Roller frame, but on a larger scale! Painters are able to use a natural hand position, the extension handle provided or any standard extension pole for those hard-to-reach places like the ceiling, upper walls or deck. Since the cover attaches on both sides of the cover, painters are able to apply equal pressure, which creates a consistent paint trail. This leads to better results in less time, with less frustration and fatigue. When painting is done, clean-up is a breeze. Simply unscrew one arm, tilt the frame sideways and most covers will fall off hands-free.