Capacity:1.5-13mm ; Key Diameter: 6mm/0.24 Inch ; Gear Diameter: 17.5mm/0.69 Inch. Drill chuck wrench for electric drill clamping tool.. Used for controlling tightness of looseness of electric drill clamping tool.. Can be used in hammer or drilling mode,very durable, comfortable to grip.. Note: package contain the key but not includes a chuck..
