Manacles and irons: These consist of metal cuffs for the wrists and ankles. The cuffs are joined by a short chain. They are also known as shackles. Wrist shackles are not the same as handcuffs, which are used by law enforcement agents, but ankle shackles are also known as fetters. The manacles can be fastened with padlocks, screws or rivets. If they are riveted, she means business. I have a pair of wrist manacles and a pair of fetters. They are fastened with a screw.