With 2 soft sponges and 1 backer, these drill sponges are great for siding, glass, and other light duty cleaning applications. The Hex Shank allows these cleaning brushes to be compatible with the RYOBI 4-Volt Cordless Compact Scrubber (P4400), RYOBI Brush Handle, Drill/Drivers, and _ in. Impact Drivers. Check out the rest of the RYOBI Cleaning Line-up in select stores and online. RYOBI has your back for all of your cleaning needs!