Gleaned from real life:
1 - The Pear of Anguish. This was an iron, pear-shaped gag that was shoved into the victim's mouth. The end of the pear nearest the teeth had a keyhold that, when the key was inserted and turned, caused spring mechanisms within the pear to eject a number of iron spikes into the mouth. These spikes remained extended until the key was turned past the insertion point in the opposite direction (allowing the key to be removed without deactivating the torture). Use as anal or vaginal torture is easily imagined.
2 - Mancuerda. Cord was wound tightly around the victim's arm and then quickly pulled taught, forcing the cord to cut through the flesh and muscle right to the bone. This was repeated at several locations along the arm and produced extensive bleeding, often resulting in unconsciousness or death.