Review on HMKIS Electric Spin Scrubber: Powerful 360 Cordless Tub and Tile Scrubber Bundle with 5 Replaceable Brush Heads, Extension Arm, and Adapter for Effortless Bathroom, Tub, Tile, and Kitchen Cleaning by Dhoal Shankar

No tools or easy way to change brushes. One said "just pull". I pulled at 200 pounds. Even the retaining hooks are made of plastic; They are new and the edges are not yet round. I only found one way. 2 screwdrivers hold the retaining hooks and you can pull it out if you have a third hand. The result of the tugging and wiggling: the driveshaft is bent and the brush is galloping around my car like a wild horse. Unfortunately I couldn't test it further. The above problem should be fixed by the manufacturer.