The Handcuffs are an Uncommon Catcher in Unturned 3.
The Handcuffs can be used on a Player using the Surrendering Gesture. When used, it restrains that Player's hands, preventing them from equipping, picking up, or using items.
Only the Player who locked them can unlock their Handcuffs using a Handcuffs Key. However, locked Players can unlock their Handcuffs by leaning back and forth with the Q and E keys by default 128 times.