Thumbcuffs

Thumb cuffs are metal clamps that are designed for restraining the thumb. They can also be used for constraining the toes.

In conjunction with handcuffs this result in a very effective fettering of the hands, which makes any attempt at movement very uncomfortable, as the clips are usually made immobile in one piece. If they are created using the keyhole towards the body, it is difficult to extricate themselves alone, even if one is in possession of the appropriate key. In prisons and the like these chains usually find no application, they can be found almost exclusively in the BDSM area.

The Bondage of the big toes with thumb cuffs in combination with hinged handcuffs on the ankles makes a movement of the feet difficult.

Hazards

Main article: convict paralysis

The use of thumb cuffs can lead to nerve damage. Particularly in the case of a permanent tensile load or too narrow can create damage to occur, which are often not noticed in the current situation and months-long, if not can even cause permanent nerve damage. The damage is usually accompanied by a feeling of numbness.