Wrist Handcuff with extended chain, encircling the entire waist and crossing over to the back with loop for abdominal adjustment, with extended chain for second person, if necessary. Totally produced in 304 Austenitic Stainless Steel. It has a safety lock with an activating device located in the internal part of the cuff, not allowing its opening without the proper key. Two keys are also included, produced in the same steel as the handcuffs, in one single piece, without seams or welds.