Protecive cover designed to fit replacement insert for AL-KO secure wheel lock 48. For maximum caravan security, the AL-KO wheel locks fits closely between the spokes of the alloy, protecting the wheel nuts and preventing leverage of the lock. This sturdy protective cover creates a barrier between the alloy wheel and lock preventing, any damage to your caravan wheels when fitting and removing. Suitable for use with AL-KO secure lock 48 insert. Please note: the complete AL-KO Wheel Lock 48 includes this cover as standard. Which AL-KO lock fits my caravan? AL-KO wheel locks are designed to fit specific alloy wheels. Find out which AL-KO lock will fit your caravan.