Handcuffs are a strong trap item that prevents the subject from doing any actions other than running or jumping. They last for a short period of time and can only be used once. You can also apply it to yourself. Handcuffs are useful in an array of situations, want to prevent a subject transforming to a Terror? Handcuffs. Want to stop somebody using that pesky Return Pad? Handcuffs. Want to trick others by handcuffing yourself? Handcuffs.