The Lezyne Trigger Drive features a CO2-inflator that is made out of 100% CNC machined aluminium. With the Trigger Drive you can dose the CO2 coming out of your cartridge. This inflator is suited for CO2-cartridges that feature screw thread. Thanks to the Anti-freeze protection you can hold your CO2-cartridge. Suited for French valves. Trigger Drive is screwed onto the valve for an airtight connection.