Maypole Strongbox Hitchlock:Lightweight and very easy to use, theStrongbox hitchlock is sure to keep your caravan secure,and can also be used with leglocks and hitchposts.It\'s independently tested, and insurance approved. Diamond 7 security level.Fits Alko, Albe, Winterhoff, Harrison, B&B & most other open handle hitch typesFits Hitched & Unhitched.Robust Steel Construction.High Visibility Yellow.Anti-Prising Lip.High Security Pick Free Lock, with Anti-Drill Feature.Supplied with 3 Keys and robust plastic carry/storage case