Tubular pin tumbler lock

A tubular pin tumbler lock, also known as Ace lock; axial pin tumbler lock; or radial lock, is a variety of pin tumbler lock in which 6-8 pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape. Joseph Bramah is credited with the invention of the forefather of the tubular pin tumbler lock except his used iron wafers not cylinders (red and blue in diagrams). He received a patent for his new lock in 1784. J.A.

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