A federal judge in San Diego has ruled that billy clubs are protected by the Second Amendment. The ruling was by Judge Roger Benitez, in a case known as Fouts v. Bonta:

This case is about a California law that makes it a crime to simply possess or carry a billy. This case is not about whether California can prohibit or restrict the use or possession of a billy for unlawful purposes…. Historically, the short wooden stick that police officers once carried on their beat was known as a billy or billy club. The term remains vague today and may encompass a metal baton, a little league bat, a wooden table leg, or a broken golf club shaft, all of which are weapons that could be used for self-defense but are less lethal than a firearm….