Insurance Approved hitch lock completely covers hitch head and bolts. The Fortress B Hitch Lock fits Al-ko AK301 Head, the Bradley Autohead 2.7kg and Bradley Autohead 3.5kg Hitches. Hitch lock for hitch fitted many smaller Brian James Trailers & Brian James Car transporter trailers, and more. to ensure you are choosing the correct hitch lock, the Fort B will fit the AK301 head (the hitch will have this stamped in the side), whilst if you have the AK351 head (generally on the bigger trailers), you will need the Fort A hitch Lock. This Hitch Lock is designed to fit the Bradley Autohead when the hitch is fitted on braked trailers. It is unlikely to work with unbraked trailers due to the way the hitch is mounted on the trailer drawbar. For confirmation for which model hitch fits this hitch lock please refer to our hitch lock selection fitting guide. Hitch lock will fit hitched and unhitched to prevent car and caravan being separated in car park or motorway service station. The maximum security safe style lock on this hitch lock has twin hardened pins to lock and anti-drill protection on the lock to deter thieves. Hitch lock finished in Zinc pacifate and painted bright red for maximum visual deterrent. Compact and easily stored which makes it ideal for touring, tough plastic hitch lock carry case available as an extra from SAS. Other Hitch Locks also available for other hitches.