Buying our first caravan last year was a leap in the dark for us. Reading stories of levelling the van on wedges or modified jacks were for us a major concern. We saw The Lock”n”Level at the caravan show and decided to take a chance on it. That was the best decision we have made so far. This simple device has given us perfect results every time we’ve used it. With this little device and an I Phone spirit level app we’ve had a perfectly level caravan in minutes even on slopes that were proving challenging for other campers with wedge and jack type solutions. Like all simple solutions this device gives perfect results every time. It takes up virtually no storage space and is so simple to use. 1. Pick your site and if fitted line up the wheel lock. 2. Lay the bladder alongside the wheel to be lifted. line the centre line marked on the bladder with the wheel axle. 3. Move the caravan forwards until the bladder can be slipped in behind the wheel. 4. Move the bladder in behind the wheel aligned with the tyre. 5. Roll the caravan back until the axle is aligned with the centre line on the bladder. 6. Fit the wheel lock. 7. Inflate the bladder until the desired amount of lift is achieved. 8. Lower the corner stays as required. Child’s play Thank you for such a well engineered and effective device.