Professional Grade Cuffs: The police handcuffs were designed to ensure reliability and durability for law enforcement agencies worldwide, being incredibly sturdy and dependable even in case of resisting arrest.Premium Quality Construction: These real handcuffs are made with superior quality, heavy duty 6112 steel, with nickel or black oxide finishing, having a robust and well-made design which is guaranteed to withstand the test of time.Versatile: Our chain handcuffs are available in 2 colors, depending on your preference: silver or black. Both were made with high-quality and durable material. You can use them for professional rpose if you are a security officer. Easy use of our handcuffs makes it suitable to be used by anyone who are just concerned about their own safety in risky situations.Double Lock: Unlike similar products on the market, these metal handcuffs feature an innovative double lock system which prevents tightening once the lock is engaged. The cuffs include 2 handcuff keys per pair.Fits Most Wrists: The handcuffs have 16 locking positions, being easily adjustable depending on the size of each wrist. These cuffs are standard police accessories, ideal for professional use.