Handcuffs are used in interventions, whether police or military, to restrict a person's freedom. Handcuffing their hands, or even their feet makes it much harder for them to escape or attack you in an efficient manner. Handcuffs can also be used to immobilize a person who might attempt to harm themselves.
In our offer, you can find metal handcuffs from the Czech company ESP or handcuffs used by the Police from the RALK brand. We also offer textile or plastic disposable handcuffs (and special blades designed to cut them). that is easy to hide in civilian clothes, or you can carry them in your vehicle for any eventuality.
Please note, that using handcuffs on an unwilling person can be against your local laws.