Product information and features: All parts made from steel (Pickle in Oil) with internal parts case hardened. Double tumbler locking system. High tensile spring (56-58 HRC). 13 Locking position on 3 mm thick ratchet. Handcuff cheeks – 2 mm thick per side. Individually packed with 2 keys. 50 packets per box. Weight handcuff – 300g Static diameter – 50 mm (cuff inside diameter). Static load approximately 1 500 N (pulling force). 10 RIVET POINTS (MACHINE RIVETED) Non fold-able.