From the manufacturer

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.

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
• Available with one 16g, or 25g CO2, or as a head only
• Compatible with threaded CO2 cartridges only