A durable CO2 dispenser constructed from CNC-machined aluminum, the Control Drive CO2 features control valve operation for easy, precisely controlled bicycle tire inflation and a Twin Slip Chuck head which presses onto both Presta and Schrader valves. A neoprene sleeve insulates your hands from the cold during CO2 discharge. FEATURES: CNC-machined aluminum dispenser Control knob twists for easy inflation Twin Slip Fit head presses onto Presta and Schrader valves Neoprene sleeve insulates hands from cold during discharge Comes with one 16g CO2 Compatible with threaded CO2 cartridges only