Bolts, Ball scale and cable are the different metal seals available in the market in different specifications for different use. The bolt type seals operate on push, pull method in which the head of the device is pushed in to get a lock position and pull for opening operations. It can also be removed using cutting pliers. Bolt type seals are used by workers in ports and ware houses. Ball type seals are usually used in trucks and other road transports for quick handling. The setup will have a ball type metal sphere attached to a metal rod which is either pushed or locked against a housing section for rigid protection. The unlocking this set is also very similar to locking, the thread in the housing is loosened to release the metal rod and free the container. The cable lockers are one of the versatile security seals in the meat family they are normally used in sealing containers to trucks. They usually have internal locking system which is limited only by cable length.