With tough bristles, this brush is great for concrete, masonry, and other heavy duty cleaning applications. The Triangle Connector allows this cleaning brush to be compatible with the RYOBI 18-Volt ONE+ Cordless Telescoping Power Scrubber (P4500) and RYOBI 18-Volt ONE+ Cordless Power Scrubber (P4510). 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!