Zak Tool ZAK Tool 5inch Corrections Hand Cuff Key Black ZAK. The Key Part Is Heat-treated Stainless Steel That Is Flared Out At The Base For Extra Strength And Then Narrows At The End. For Greater Security In Correctional Environments There Is No Swivel That Could Break Off. The 90b Handcuff Key Is 5 1/8 Inches Long. Made In Usa. Package Contents: Zak Tool Zak Tool Zt90 5inch Corrections Hand Cuff Key Black