Padlocks are one of the oldest locks. Its working is completely based on a spring-based mechanism. Although it can be easy to pick such type of lock but still can be widely accepted by the worldwide public. Its working mechanism is based on two different components one is a shackle and the other is the primary components located inside of the lock body. The shackle is generally known as u shaped metal piece located 90% of its part outside of the lock body. It is responsible for locking unlocking. As explained by locksmith brooklyn they try hard in making shackle strong so that no cutter or tool can easily cut this.
In terms of lock body inside of it contains various movable pins. These pins are connected in the form of springs for its up-down movement. These pins only move when it comes in contact with its specified metal key. These pins are responsible for the movement of shackle leading to secure locking unlocking.