A clamptite tool can reinforce cracked ax handles, replace hose clamps, and anything you need to put a cinched down wire on. Even with bare 14 or 12 gauge copper electrical wire which is easy to work with, it will hold 120 psi on an air hose.
Bring a little wire along.
The new code readers that also display sensor data is a must have for me. It’s been two years since it was last used, when a family friend was stuck in a parking lot and her car would try to start, but wouldn’t run. How would you tell what it was? Headlights were bright so there was decent voltage in the battery, smelled like gas in the exhaust, and it cranked evenly so compression wasn’t in question. One person tried a simple code reader and it just showed misfires, but that doesn’t give any idea what it was. A squirt of starting fluid had it running for a few seconds so the ignition was ok and it’s a fuel issue of some kind. What’s your next step - a fuel pressure test?
Hooking up the scanner to read sensor data, in only five minutes it showed the temp sensor was reading way hot so the computer was trying to start it with lean injector pulses. Easy peazy. Fuel pressure test or testing injector function wouldn’t have solved it.