The Model 7030-6X Oversize Chain Handcuff has additional links to accommodate individuals with larger upper bodies and wrists. The added links give 5 1/2 inchs of distance between the cuffs. The added distance reduces shoulder, arm and wrist strain. The Model 7030-6X eliminates the need to link two sets of cuffs in order to restrain one individual. The Model 7030-6X comes with a lifetime warranty for manufacture defects. Updated design with new lock mechanism. Two keys supplied. Made in USA.