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The sticks used in pool and long, slender and lean. Apply light torque while pivoting a long, wavy rake inside the lock, inserting and removing it slightly as you go. In particular, you should feel when you set a pin as much in the torque tool as you do in the pick. When you feel confident visualizing and using picks to maneuver around the pins in the AR1 and SX keyways, you're ready to start actually opening locks. The first step toward learning to defeat locks is a thorough understanding of how they work, where their security comes from, and how their design and manufacture introduces potentially exploitable vulnerabilities. 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). They include a standard hook (called the "Hook" in Peterson's catalog), a larger hook (the "Gem"), and a deep curve (the "Reach"). The height (or cut depth) of a key under each pin stack position is called its bitting; the bitting of a key is the "secret" needed to open a lock. For example, the method it calls "scrubbing" is called "raking" by almost everyone else (it's not something I suggest you spend much time on, at least at first, by the way).

For example, Medeco locks use special wedge-shaped bottom pins that are rotated into one of several possible positions by the key cuts (which can be cut at different angles). A detailed introduction to locks is well beyond the scope of this document; we assume here that you already understand, or have access to, the basic principles. However, because they jam when false set, locks with serrated pins tend to impression very well (impressioning is a decoding technique that produces a working key based on marks left on a progressively cut key blank). It is aimed at locksmith practitioners but has a cogent discussion of principles as well as technique. 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. 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. Again, continue with the AR1 locks. 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.

Picking lever locks generally requires different tools from those used for pin tumbler locks, and high security lever locks often require specialized purpose-made tools. The book is an encyclopedic guide to mechanical locks, how to evaluate them, and how to defeat them, aimed primarily at investigators, law enforcement and intelligence operatives. 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. Spend a lot of time playing with the three pin lock so that you can recognize the pin states easily and naturally. In the locked state the plug is prevented from rotating by a set of movable pin stacks, typically under spring pressure, that protrude from holes in the top of the opening in the shell into corresponding holes drilled into the top of the plug.

The sets are combined to one single set of 7 which is later setup with a bunch of 8 black balls. Two sets of balls are used in this game, one is coloured and the other is striped. The table and balls used in billiards are larger than those in pool. The cloth used in billiards is fast making the balls move more swiftly on the table. The cloth used in pool restricts movement making the ball movements slower. The cloth on the table is slow which reduces the pace of the balls. The table sizes, balls and cues used in both pool and billiards are different. The head and the feet look very different, but they are parts of one organism. The table size of the pool game is three and a half feet by seven feet. The balls used are smaller and the table is pocketed. Spring steel or stainless steel, between .020 and .035 inches thick, are typical materials. As you lift the pin stack with torque applied, eventually its cut will reach the shear line, allowing the plug to turn; the top pin will then be completely trapped in the shell, while the bottom pin stays in the plug, no longer held down by spring pressure.

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