Don't ever use them. I went for a nail in my tire and they said they would only help me if I bought a new set of tires bc my existing tires were almost 4 years old. Went to Discount Tire and not only did they fix but did NOT pressure me to buy a new set now (they said I need it soon but not urgently). Just don't waste your time here. They're rude, chauvinistic, demeaning and completely unhelpful.