The lezyne pressure drive cfh is a versatile design that combines the efficiency of a hand pump with the convenience of co2 the innovative 2 in 1 inflation system works as a high pressure hand pump or co2 inflator the integrated steel braided co2 flex hose cfh also works as a co2 dispenser the hand pump features a cnc machined aluminum body piston and handle the flip thread chuck non abs works on both presta and schrader valves which is great when you are out on a family or group ride