This E-Track strap with spring E fittings smoothly clicks into the slots of your E-Track rails along the walls or floor of your flatbed or interior van. The versatile ratchet allows you to adjust the length of the tie-down strap. Tighten or loosen this E-Track strap as the size of your loads and their tie-down requirements fluctuate, providing security to cargo that could otherwise shift and cause havoc.DC Cargo Mall has ratchet straps with many types of end fittings. In this case, the steel spring e fitting is designed to click effortlessly into the E-Track. It clicks in as a reaction to your push and requires only a lift up on a tiny lever to remove.