This trephine was a hand-powered drill with a cylindrical blade that was used to bore into the skull. The spike in the center was used to start the procedure and to hold the blade in place while cutting.
Perkins Tractors were quack metal rods that claimed to have the power to draw out "noxious electrical fluid that lay at the root of suffering" by simply passing them over the skin. Reportedly, even George Washington bought a pair.
Hernia Tool This unique tool was used after the restoration of a hernia. It was inserted into the body near the affected area and left there for a week to produce scar tissue that would help seal off the hernia. [looks painful]