The Safety Strap was created to assist commercial truck drivers to get into and out of the rear trailer safely. As a commercial driver for over 18 years, we have safety meetings daily. Continually striving the importance of the 3-Points of Contact rules. After witnessing and seeing first hand the ability to gain access to swing door trailers makes it tough to apply 3-points of contact. Having a third point of control would be a lot safer. 3-points of contact, 3rd Point of Control.