New Season Industrial Corp is the Asia ONLY factory whose handcuffs are certified by NIJ - USA National Institute of Justice. Please visit NIJ website to see this certificate. In past 40 years New Season make handcuffs, batons, gun parts, speedloaders, magazines, whistles, duty gear, police products, military products. Hinged Handcuffs have several styles - Twin Hinged and Tri Hinged. Material: Stainless Steel and Steel Nickel Plated. The quality levels of handcuffs for government tenders, police, military are different from that for security guards. The minimum order is 504pcs in one shipment. The payment term is bank remittance (T/T) in advance. Our production capability: 40, 000pcs per month. 100% of our products are made in Taiwan ( not China ). OEM and ODM are available. If the buyer qunatity is only one or two hundreds pieces, please contact with our distributors in each countries. If you have any question, please feel free to contact with us. New Season Industrial Corp.