This round pocket hand cuff key fits for most of the leading, standard-type professional hand cuffs. Easy to unlock, you need a cuff key which is so versatile and convenient like this key. The best handheld arc design of the cuff key body increases the grip feeling, the user can easily hold the key without sliding it or holding it unstable. Greatly improved the sense of use and security in special moments. Subjected for 5000 times rigorous loss testing, ensuring maximum durability. And with security unlocking pin universal fits for double-locking hand cuffs. In case of an unwanted situation simply use the pin for unlocking. The excellent design of Back Set allows quick positioning of the hand cuff keyway. As a result, this key enables the fastest opening of all standard series hand cuffs, making it perfect for law enforcement, police, fire agencies, and users of tactical gear. Use stable forging method, made of light and strong polymer for durability. This 4" pocket cuff key is very easy to clip fastener, and can be clipped anywhere such as cuffs, pockets, ties and wallets without falling off.