Zak Tool #90B Large Non-Swivel Correctional Handcuff Key replaces the discontinued Zak Tool Model 70B. The Zak Tool 90B handcuff key body is an advanced, lightweight polymer that is extra strong. 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.