I was really looking forward to this product. Used it on the day of arrival. Not very impressed. Since the brush tips are as thin as they come (and fall out on first use to get even finer), I don't think you'll end up using many times, in fact you won't see more than two uses with mine, quite not to mention the fact that he was really bad at cleaning. Overall disappointed. I have a C5 Corvette. It might be better with another car that has deeper nuts (although I can't think of one that has them)