I have used this tool sparingly only to check car tires and inflate when needed. When not in use, it was stored in a safe place to avoid being hit. But last week the top just fell off during use. You can see that it has been pressed onto the shaft and lightly crimped around the edges to hold it in place. The top will snap back into place, but I had to wonder if the PSI readings are accurate (and if they ever were). Thrown away.