Clejuso Model 15 Heavyweight Handcuffs. In a class by themselves, these are some of the thickest, heaviest handcuffs ever made. Finger activated double locks. Over 1 1/2 inches thick, weigh 47.7 ounces. Minimum inside perimerter: 6.5". Maximum inside perimeter: 8.75". Non-standard keys, 2 included.