Batons, which also named as billy club, police truncheon or nightsticks, originate from the Victorian Era in the 1800s, meaning the "policeman's club" in London, when the baton is made of wood and cannot retract, it's a symbol of power and order in the past.
Batons have been evolving and changed a lot during the times. Most government and police officers have been utilized the metal steel batons instead of wood, also these new mode of batons are expandable, collapsed into three sections and easy to carry with a belt pouch or holder.ASP tactical batons are well known as the advanced manufacture technology and standard as U.S. Law Enforcement and Police Security Equipment.
Mainly there're several types of expandable batons in market based on the mechanism:
1.Friction Lock. It's been widely used in most batons. The baton locked by the friction of the knots between tubes when expanding, therefore the connection knots has been well overlapped to ensure that it won't be unlocked while striking.
2. Magnetic Lock. The difference is the bottom steel slot has been changed into magnet. magnetic lock type has two drawbacks: First, the tail cap occupy a considerable length and takes up larger length after the baton's retracted ; Second, magnetic baton have bad influence on daily carries, Watches, magnetic cards and other items have adverse effects.
3.Mechanical lock: The mechanical latch-type batons are to rely on the springs of connecting part to complete the lock state while expanding. Closing is easy to press the button on the tail handle. Disadvantages: First, the knots between tubes will slightly shaking and not so tight as the friction types; Second, the complex structure is easy to malfunction and hard to repair.