Complement your cleaning collection with the RYOBI 2 PC. Hard Bristle Brush Kit. With hard bristles, this kit is ideal for cleaning brick, concrete, rust and other surfaces. The 3.5" brush is ideal for cleaning larger areas while the 2" brush is perfect for cleaning hard to reach areas. The sturdy Hex Shank Connection ensures a secure fit to any 1/4" hex collet. These drill brushes are top rack dishwasher safe for your convenience. For best results, always pair your RYOBI tools with RYOBI accessories. This accessory kit includes a 2" and 3.5" Hard Bristle Brush and is compatible with the 18V ONE+ Soap Dispensing Telescoping Scrubber (PCL1701), USB Lithium Power Scrubber Kit (FVG51K), Palm Scrubber (A95PS1) and most drill/drivers.