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). Reinforced link handcuff. 13 Locking position on 3 mm thick ratchet. Handcuff cheeks – 2 mm thick per side. Handcuffs are electroplated. Individually packed with 2 keys. 50 packets per box Weight: 400 grams. Static diameter – 50 mm (cuff inside diameter). Static load approximately 1 500 N (pulling force). Total length of linked handcuff – 230 mm closed and 250 mm open 10 rivet points GALVANIZED SINGLE LOCKING KEYS (eco handcuffs).