Saw this kind of combination padlock securing the doors of a truck. m-wave-bike.com/products/accessories/17-locks-and-anti-theft-devices/230120-pd5-combination-pad-lock/ As it has 5 wheels it attracted me and I bought one of these. It has a hardened shackle that is locked with a ball bearing on one side. Although the lock has 5 wheels and one false gate on every wheel I cannot recommend it to secure anything valuable with it.