This device is comfortable, versatile and inexpensive spreader system. The cuffs are made of heavy-duty nylon on the outside to hold the strongest prisoners, yet comfortable neoprene on the inside. The spreader mid-section is rigid so they can not adjust their position. The midsection is made of nylon with a reinforced bar underneath. Cuffs secure using heavy-duty Velcro. The ankles are 16 inches apart while the wrist is 9 inches apart.