Cooling System Cap Adapter FZ 36

I have two of these sitting on my office desk for the last 5 years. I own one for myself and the other was bought as a shop supplied tool. I took the chance and bought one for myself after the shop tool came apart. I used it maybe a couple of times before the same defect happened to mine. I called AST and they didn't seem very eager to help me and you could say they were a little indifferent about my situation. Just be warned, I tried using this adaptor on a Chevy radiator cap rated for 20 psi and when it came apart. I would not recommend purchasing this tool for any caps rated above 17 psi. I would submit a photo of both tools, but that option isn't available on this website.