5 different brush sizes, you can choose any one to suit your needs, enough length for easily exploring and reaching into the lug nuts, narrow or tight space.No wash is complete without a set of scratch-less brushes. Great for wet and dry use, this multi-function brush aims to remove the dust, bread crumbs and other small items out of your wheels, air vents, trim, seat crevices and emblems, make your loved car fully tidy and clean from the inside out.