Elements of a LockThe Housing or CylinderThe Shackle or BoltThe PlugThe CoreThe KeywayPins, Wafers, Discs, and LeversSpringsThe BibleThe Wheel Pack and Drive CamCams, Tails, Latches, and Ball BearingsLocking MechanismsPin-Based LocksWafer LocksCombination LocksLever LocksWarded LocksDisc Detainer LocksSummary