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Pin tumbler locks and disc detainer locks may look similar, but they operate differently. The pin tumbler lock is the older design, with a mechanism dating back to ancient times. It's commonly used today because it's simple and affordable to manufacture. However, it's also easier to pick due to the loose tolerances in its design, allowing tools like tension wrenches and lock picks to manipulate the pins.

On the other hand, the disc detainer lock, invented in 1907 by Emil Henriksson, founder of Abloy, is more secure against picking. This lock uses a series of rotating discs instead of pins, and its cylinder is locked by a sidebar that only retracts when the correct key aligns all the discs' gates. While more secure, disc detainer locks are also harder to pick, though specialized tools and techniques still exist to bypass them. Despite these differences, both types of locks remain widely used, and their continued evolution reflects our ongoing efforts to balance security with practicality.

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