The supplied Premium Padlocks consists of three main components that work together to provide security for numerous applications. Padlocks with modular locking mechanisms can often be taken apart to change the tumblers or to service the lock. Modular locking mechanism cylinders frequently employ pin, wafer, and disc tumblers. Padlocks are detachable locks that normally incorporate a u-shaped bar thats hinged at one end and designed to be passed through an opening of a hasp. The Premium Padlocks are very effective.