So I bought this because I needed it just in case. Well I noticed my tire was a little low and figured it was time to put in my new air compressor. Needless to say, this was a huge mistake. I got some air in my tires but guess what, it destroyed my valve stem. Now I'm sitting in the driveway with an apartment. They are not screwed directly into the valve stems. They should only be pushed in but do not need to be screwed in, removing them pushes the valve stem in. Now I have to take the tire off the car, swap the valve stem and hope my new tire doesn't get damaged by this compressor. Just watch out for those bolts on the valve stem, they're nothing like the ones you see at the gas station. Very disappointed as I bought it for my birthday.