three anti pick pins a over-sized pin - hence zero tolerant for picking and 3 anti drill pins.
the keys lowest cut or bitting is the location of the zero pin and.... key cutting info to come.
A section to discuss picking techniques for specific ultra high security pin tumbler, wafer, and dimple locks containing Bi-Lock, and other interactive pins. Locks discussed here would be Medeco, Mul-T-Lok, Best, ASSA/Abloy, Kaba, Sargent & Greenleaf, Schlage Primus, etc.
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