Typically, they were made from a single piece of heavy metal, and they also served as the backplate for the inner workings of the lightsaber, completing various circuits. In some lightsabers, the cap also held an extra backup power cell; such was the case with Dooku's lightsaber and Obi-Wan Kenobi's first lightsaber. These heavy ends of the hilt were sometimes incorporated into the fighting styles of a Jedi as an alternative to actually impaling an opponent on the blade end of the weapon. This sometimes provided a nonfatal resolution to an incident.