These tire deflators are well made. You get 4 deflators. Key ring, 4 metal caps, 4 plastic caps, 2 extra O-rings, a bag that contains everything and a hard plastic box that contains everything. All 4 deflators looked the same and I tried all 4 but there was one that barely released any air. I'm actually at a loss as to why. I tried the O-ring without replacing it with one of the spare rings. Nothing worked, everything else worked great. So 4 stars for that. 3 good ones will still get the job done much faster.