3. Thumb screw
The thumb screw is a device originally designed to extract the truth or the confession from the victim by crushing his toes or fingers. Bigger versions of this device were also designed to smash heads, knees, and elbows.
4. Spanish donkey
This device was designed to kill the victim slowly. The victim would be placed on it as if sitting on a donkey. Then the victim would be tied with weights on each leg to finally let him pierce through the sharp edge of the device. This device was used in Spain in medieval time.