Nite Eagle Handcuff Key Extender is constructed of solid black aluminum. 4" long with squared body for control. 4" long key is the most preferred key used by the Bureau of Prisons. Includes double lock pin and has hole through body, not a swivel that could break off. Included key is replaceable with standard handcuff key. The key is held very securely and cannot be removed without a 1/8" hex bit. Designed and manufactured by a law enforcement officer. Made in USA.