Larger than standard cuffs by 17 percent, 25 locking positions and a shackle diameter from 5 3/4 inches to 9 1/4 inches. In addition to the quality features common to all HIATTS handcuffs, our tri-hinge models feature heavy-duty solid hinges for extra strength and durability. Handcuffs feature an 18-tooth, 3 retaining bar system, paired with a positive swing-through action, built-in backloading for fast cuffing; heavy-duty construction with oversized rivet heads for added strength and side double locks; with two keys. 12 oz.