This Heavy Duty Handcuff offers an above standard double hinged for maximum strength and literally unbreakable hinges. It comes equipped with two nickel keys which housed the double lock tip. It also has single strand teeth with single strand groove which fits seamlessly through the double strand body offering more security. Our Official Law Enforcement handcuff comes equipped with a beautifully stitched black faux leather sheath with a large belt loop to fit standard duty belt. The closing on the sheath offers a velcro mechanism making the handcuff readily available for action. Our Official Law Enforcement handcuff features the double lock hole to help prevent the handcuff from tightening more on a suspect hand. To release double lock mechanism, turn the key counterclockwise and to release handcuff, turn the key clockwise. These higher grade handcuff features a stainless steel nickel finish. Please note that because of nickel finish scuff marks may be visible on handcuff. Restraints should receive regular care and maintenance. Inspect them frequently. Keep the ratchet and key hole free of dirt, lint or other foreign substances which may hinder proper functioning.