Works with all Genuine Innovations threaded and non-threaded CO2 cartridges (except 45 gram) and Big Air! Trigger lock prevents accidental activation. Push-on for Presta, screw-on for Schrader. Really easy to use. Simply drop the CO2 cartridge into the cup, screw on the head, attach to valve, unlock safety latch, attach to valve stem and pull trigger to release air. So quick and easy you’ll be back to riding your bike in no time! Works GREAT for motor sport applications.