1.it is made of 5mm thickness and 560mm diameter mold steel with screw positioning device, which enables it to firmly lock heavy-duty trailers
2.Locking mechanism is constructed of case-hardened steel without exposed shackle (cannot be cut with a hacksaw or bolt-cutter). The padlock shackle is 7/16th of an inch in diameter.
Total max weight 20 kg, including padlock and wrench.
3.This product applies to heavy-duty trailers, construction trucks, container trucks, and big buses with double wheels in parallel.
4.It can be installed and uninstalled very rapidly by one person and can be stored flat in a box or behind your seat.