Dual purpose portable Wheel Clamp to suit 195 50 R13 AND 195 60 R12 wheels. As used on Equi-trek TrailersAwarded Practical Caravan Magazine Best BuyBulldog QD13 Trailer Wheel AutoclampDual purpose clamp ideal for towing and storage.Fitted in seconds without the use of the key.High security drill and pick resistant lock.Lower arms case hardened. Large disk protects wheel nuts. Compact easily stored in the front locker. Insurance approved. Sold Secure Silver approval. The QD Wheelclamp meets Police approved standards. Secured by Design is the only form of Police approval for products in the UK.