O2 Wrench

A compact keychain wrench for portable oxygen tanks — designed to fit D and E tanks, but likely compatible with others.Keep it handy on your badge reel, keyring, or go-bag so you’re never stuck hunting for that one wrench everyone swears was “just here a second ago.”3D printed for convenience, light enough to carry everywhere, and strong enough to crack open your next breath of fresh air.Recommended material: PLA+ or PETGSupports: NoneInfill: 25–50%Use case: D/E oxygen cylinders, portable setups, “Oh no, who took the wrench again?” emergencies.