Driver pin is a component in lock mechanisms, primarily in pin tumbler locks, which interacts with key pins to allow or prevent the lock's operation. Positioned above the key pins in the lock cylinder, these pins are pushed downwards as a key is inserted. The correct key aligns the driver pins and key pins at the shear line, enabling the cylinder to rotate and the lock to open. Incorrect keys disrupt this alignment, thus securing the lock. Driver pins vary in material and design, with some featuring spool or mushroom shapes to increase resistance against lock picking, a technique known as security pin implementation. These modifications create a false set or increase the skill required to pick the lock, enhancing security measures. The materials used for driver pins, such as brass, steel, or hardened steel, are selected based on durability and resistance to wear, shear, or corrosion, contributing to the lock’s overall integrity and lifespan.