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The TIHK Hk2 Handcuff Key is designed to be the world's smallest concealed non-metal handcuff key. With the improvements made in this second generation key, you can easily attach the key to belt loops, shirt sleeves, or other easily reached locations where it will stay secured. Should you find yourself unlawfully restrained with handcuffs, the TIHK HK2 key will be ready to unlock the handcuffs that are being used to restrain you. This key also makes an excellent backup handcuff key for police or security officers who are issued handcuffs for duty use.