The Draper 99674 Tow Ball Lock features a non-corrosive body The Draper 99674 is a 50mm Tow Ball Lock manufactured from non-corrosive solid forged steel for durability and reliability. This is a necessary precaution to help prevent your trailer, caravan etc. being towed away from your vehicle. The lock fits onto the coupling hitch and is supplied with two keys and a 6mm hex key. Suitable for Draper and other manufacturers\' tow balls. Features: Non-corrosive body Supplied with two keys and a hex key Fits onto coupling hitch to prevent tow away Specifications: Weight: 0.35kg Ball size: 50mm