The technology built into M4, including the movable key element, and side and lift pins in the cylinder, stretch the boundaries of features that can be built into a lock and key system: Cylinder side pins and a lift pin which engage the sidebar prevent opening until the elements are aligned in the correct position, protecting against bumping and picking. The patent-pending movable element in the key deters 3D printed copies of keys while patent-pending key control protects against unauthorized duplication of keys. Secondary side-pin bittings provide expanded master keying capabilities, making the largest master key systems possible - 2,000 times that of a conventional cylinder! Learn more.
