This special security handcuff, in a nickel finish, features a larger dimension chain and swivel for special security situations. Smith Wesson Handcuffs are fabricated from the finest quality carbon steel. They are manufactured with heat treated internal lockworks, featuring smooth ratchets for swift cuffing and double locks to prevent tampering. All SW handcuffs meet or exceed demanding U.S. National Institute of Justice tests for workmanship, strength, corrosion and tamper resistance. IMPORTANT NOTE: Handcuffs can only be shipped to addresses in the United States