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So that’s one of the sort of confusions I’m talking about. But I’m not saying that there is no ghost. There is a tradeoff, of course, since a longer handle may be difficult to maneuver around obstacles. In practice, of course, locks aren't perfect: the pin holes in the plug are slightly out of alignment with respect to the shell and the pins and pin holes are each of a slightly different diameter. Special double-sided jiggle-rake picks are commercially available for such locks. It is not clear what some of these picks are intended to actually do. Many manufacturers outfit their picks with elaborate and supposedly "ergonomic" handles, but these often hinder performance as much as they might enhance it. Much of this is simply a matter of individual preference, but certain choices here can also have an impact on performance. Success in lock picking is mostly a matter of skill. In a lock with six pin stacks with a uniform chance of a pin setting at either shear line, the probability of a picked lock actually opening is only 1/64. Picking techniques for these locks involve the use of special torque tools designed to put torque on only one of the two concentric plugs.

Good tools are important, to be sure, but once a few basic tools are available the student of lock picking is usually better off investing in new locks on which to practice rather than in new picking tools. It is always best to practice with your lock mounted to a door or wood platform, as they are here, or at least fixed in a vice. The principles and skills of lock picking, once mastered, can be applied against the vast majority of commercial pin tumbler locks, and the basic tools, if somewhat unusual, are quite simple. Many experienced locksmiths and expert lock pickers prefer "home made" tools to the commercial selections, especially for picking unusual and high security locks. Few burglars can afford to risk exposure during the time required to pick even relatively easy locks, and unexplained possession of lock picking tools is often considered prima facia evidence of criminal intent. The pick design it calls a "rake" is called a "hook" by the rest of the world (it's the kind of pick you'll be using most). But the important thing, I repeat, about this kind of chant is that it’s quite different from the ordinary religious exercise that, say, we have in our churches, where we are interminably talking and thinking, and we never get to contemplation.

Over time, accumulate a varied collection of practice locks, and study different lock designs whenever you get the opportunity. In the lab there is a collection of "training locks," mounted on boards, for practice. However, because the precision with which locks can be manufactured is limited by physical processes, materials, economics, and usability considerations, exploitable weaknesses almost always exist in practice. And they do a rather surprising mantram which is like this-which you can very easily do-and it has the function of all these mantra. They are signs. But if you take words too seriously, you’re like a person who climbs a signpost instead of going where it points. Two tools -- one for each function -- are used simultaneously when picking a lock. These locks can be picked according to the same principles as used for ordinary pin tumbler locks, but, again, different tools are used to accommodate the different shape of the keyway. See Figure 1. (In practice, the cuts are produced by stacking pin segments of particular lengths, not by actually cutting the pins; hence the term "pin stack.") With no key in the lock, all the pin stack cuts rest within the plug.

See Figure 2. The plug will be blocked from rotating if any pin stack is lifted either not far enough (with the cut still in the plug below the shear line) or too far (with the cut pushed above the shear line and into the shell); to rotate, all pin stacks must have a cut at the shear line. Repeat until lock turns: - Locate the pin stack that's being pinched at the shear line (it resists slightly when pushed up) - Continue to push that pin stack up until its cut reaches the shear line and the plug turns slightly. See Figures 3 and 4. Once you're comfortable with the AR1 keyway, move on to the "Ilco SX" keyway locks and repeat the exercise. Typical commercial and residential locks have five or six pin stacks (although four and seven aren't unheard of), with from four to ten distinct cut depths used on each. The plug can rotate freely only if the key lifts every pin stack's cut to align at the border between the plug and shell. Left: Cylinder face, the lock's "user interface." Note the keyway, which is cut into the plug, which in turn sits inside the shell.

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