This is a hex shank holder for using commonly available 1/4" hex shank drill brushes(not included) on the 18V Ryobi scrubbers(P4500 P4510 PCL1701K). Patent Pending 2025. Adapter only. Tool not included. The only attachments offered by Ryobi for their 18V scrubbers are large flat brushes. This piece enables you to use any style of 1/4" hex shank brushes on your scrubber. You can run every shape and size and brand of 1/4" shank brushes out there including smaller brushes for cleaning wheels, tires(white lettering), bumpers, grills, etc. The retention of the hex shank is a slip fit so if you carry the tool pointed straight down the bit can slip out. A simple magnet placed on the inside of the adapter will prevent the brush from sliding out. Note that while this piece is precisely centered these 18V scrubbers are not pinpoint precision tools like a drill. If you look at the 3-wing mounting head of your scrubber while it is spinning it's not perfectly centered/has a very slight wobble. That mild oscillation might actually be intentional by Ryobi. Either way the pointed nose on this piece can make this 'wobble' easier to notice. After design and manufacturing costs +'s seller fees + PayPal's transaction fees + postal shipping fees this is just barely worth selling online because of all the middle men. Free shipping in the U.S. If there's a problem let me know and I'll work with you. My work keeps me away often so to be safe, handling time to get this shipped out is 3 business days. BIDDER SPECIFICS: This has to do with ensuring that new or infrequent buyers have a good experience. If you have less than 20 feedback or had a bad experience in the past 12 months please contact me first. If your feedback is private/hidden please contact me. If you have any questions please just ask. SHIPPING ADDRESS: I can only send your item to the registered shipping address at time of payment.