The Head Cage was a small device resembling a cage, which was placed on its victim's head and was held in place by a harness they had to wear. On the inside and outside of this cage were several pointy spikes. These spikes carved deeper and deeper into the victim's skull whenever they made a sudden movement or rammed an obstacle. However, the victim's hands were tied up behind their back, making the cage the only way for them to attack others or defend themselves. (Saw II: Flesh & Blood)