Manufactured from non-corrosive solid forged steel, this tow ball lock is a necessary precaution to help prevent your trailer, caravan etc. being towed away from your vehicle. The lock fits on to the coupling hitch and is supplied with two keys and a 6mm hex key. Suitable for Draper and other manufacturers' tow balls. Contents: 2 x Keys, 1 x 6mm Hex key Ball size: 50mm, Weight: 0.35kg