This item only came with 3 extensions. Not only that, but one of them looked like it had been burned (see photo). This extension was dark in colour As you might find with torch heated brass. Considering the price, all of these issues are negligible, but they just don't work. They don't seem to screw in deep enough to turn the Schrader valve itself. Between 2 valves. I confirmed by pressing the little metal dome and no air comes out when installed on the valve if no air comes out the valve won't open and AIR WILL NOT GO Bought these to inflate the tires to optimum pressure on my personal van now its so low and that helps a little now i cant drive to work until i buy a spare how many problems can i m have a product? 3 hits and I'm out.