The Model 702C-6X has additional links to accommodate individuals with larger upper bodies. The added links give 5 1/2 inches of distance between the cuffs. This oversized cuff has a 20% larger inside perimeter then the Model 700C. The Model 702C-6X features an improved internal lock mechanism for increased tamper resistance, smoother ratcheting action and greater durability. It meets or exceeds the National Institute of Justice standards for workmanship, mechanical strength, tamper resistance and corrosion resistance. It comes with a lifetime warranty for manufacturer defect. Two keys supplied. Made in the USA.