Review on SAFELIFE Heavy Duty Brass Air Chuck - Closed Flow Tire Inflator Chuck with Clip (2 Pack) by Michael Bressler

They work great but there is no way to shut off the airflow unless you disconnect them from the air source. It's not the worst deal, however. It's a bit silly when you inflate a tire only to be able to detach and reattach it over and over again. It was probably in the details and I didn't manage to read the whole thing.