Genuine Smith & Wesson handcuff key. New design is thicker and heavier than other standard handcuff keys. The Smith & Wesson handcuff key has a more heavy duty construction than other standard keys. Stamped SMITH WESSON. Works with most standard handcuffs and all Smith & Wesson handcuffs and leg irons except high security and the model 104. Smith & Wesson handcuff keys are made in the US. This is the same key that comes with their restraints.