Great for hard spots!

This set of four multipurpose deep cleaning crevice brushes for are quality made and work great for hard to clean spots. I've used them to clean the discolored grout in my bathroom, old window tracks and to remove excess lint from my dryer all successfully! The brushes make it so much easier to do these daily task and I find new uses for them everyday. They are holding up amazingly and are very strong. These are a great purchase that I cant recommend enough especially if you want to clean those frustrating areas that can be so time consuming because using these makes it simple and quick!