Clejuso Model 15 Heavy Weight Handcuffs. In a class by themselves, these are some of the thickest, heaviest handcuffs ever made. Ridiculously massive, these handcuffs are more of a collector’s item than a practical tool for law enforcement or corrections. I wouldn’t want to be knocked in the head with one of these bad boys. Finger activated double locks. Over 1 1/2 inches thick, weigh 47.7 ounces. Non-standard keys, 2 included.