https://abel-ayala.technetblog....gers.de/why-locks-4-
Hook Locks For Trucks, Vans and Skip-Loaders The Crosby Group offers a wide range of hook locks for trucks, vans and skip-loaders. We offer clevis self-locking hooks to prevent pinching, ball-bearing swing hooks that provide better side stability and lighter weight; and galvanized hooks to keep out corrosion. A combination of an algorithm for numerical continuation as well as bifurcation theory were used to study the performance of the hook lock mechanism. Nine state variables were analyzed