An armbinder is a type of restraint devices primarily used in bondage play (rather than law enforcement, medicine, or psychiatry), designed to bind the arms and/or hands to each other or to the body, usually behind the back, and employing a range of bondage equipment including cuffs, rods, straps, and gloves.
One type of armbinder is the monoglove.
Read more about Armbinder: Single Glove Sheath, Monoglove Variation, Construction Materials, Cuffs, Rods and Straps, Safety Issues and Visual Appeal