Black handcuffs

Key Features and Specifications
Materials: Typically constructed from high-tensile steel or heavy-duty aluminum, often coated in black oxide or a matte powder finish to resist corrosion and scratching.
Linking Mechanisms: Available in either chain link (allows for more flexible movement) or hinged (restricts wrist movement and prevents suspects from manipulating the cuffs) designs.
Double Locking System: An essential safety feature that prevents the cuffs from being tightened further on the wrists, protecting the subject from injury or restricted circulation.
Adjustable Sizing: Equipped with a multi-tooth ratchet system, usually offering 18 to 23 locking positions to fit a wide range of wrist sizes.
Accessories: Standard sets usually include two keys and are often sold with a durable nylon, polyester, or leather belt pouch.