The ratchet tie down straps consist of a tensioner and a webbing, with or without terminal fittings. The ratchet tie down is made of high-strength polyester or polypropylene yarn. It comes in two main types, single-part and two-part straps. At present, bandages are widely used in the transportation industry due to their light weight, ease of manual operation, and ease of use. Since it gently contacts the strapped load, it may be suitable for many types of strapping applications. Compared with the chain assembly, the ratchet tie down strap has a resilience force, so it can maintain a greater tension when tying or displacement occurs during transportation.