Review on Holikme 4Pack Drill Brush Power Scrubber Cleaning Brush Extended Long Attachment Set，Dark Blue by Erica Williams

Beautifully made brush set with a practical extension. The latter helps minimize tilt to clear low areas and also makes a great long extension for electric screwdrivers. The brushes are moderately hard and did a very good job removing mold and scum from flat surfaces and shelves in our large tiled shower. They were particularly helpful in cleaning some of the decorative tile edges where there is an intricate raised design (something I've always found difficult to clean - until now). The only issue I found was that the brush shapes don't really treat moldy grout in corners and where the wall meets the floor. I had to go back to my trusty narrow grout brush to get through these areas - that's the only reason I gave this a four star rating and not five. Despite this, I think this set is very useful for cleaning any flat or slightly curved surface.