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Most commercial torque tools are designed for horizontal orientation. Vertical orientation requires a 90 degree twist in the blade. The traditional torque tool is made from stiff, flat spring steel, bent at a 90 degree angle to provide a small blade that fits in the keyway and a long handle to which torque is applied. The game of snooker is primarily British and is played to a small degree in the Americas. Size: Snooker tables are significantly larger than pool tables, with the standard size being 12 feet by 6 feet. A functional pick kit should contain several different size hooks to accommodate a range of different keyway shapes. When a key is inserted into the keyway slot at the front of the plug, the pin stacks are raised within 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. If this pin stack is slowly pushed up with torque applied to the plug, eventually its cut will reach the shear line and the plug will turn a bit more.

While this might have gotten the lock open, you just as easily might have pushed the cut past the shear line entirely, preventing the lock from opening altogether. 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. The plug/shell border is called the shear line. 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. They include a standard hook (called the "Hook" in Peterson's catalog), a larger hook (the "Gem"), and a deep curve (the "Reach"). Over the years, the locksmithing industry has settled on a number of "standard" pick designs.

They allow very precise control over torque, what is billiards especially when employing advanced picking techniques that involve a slight reversing of the rotation of the keyway. There will be a slight "backward" pressure on the torque tool. Note that the Earth does not and will not behave like a solid, rigid billiard ball under such huge impacts as these. In particular note that because the pins are slightly out of alignment, as the plug is turned gently, only the pin stack that is most out of alignment actually prevents further rotation. Note the border between the plug and shell, which forms the shear line, and the cuts in each pin stack resting within the plug. Left: The correct key lifts the pin stacks to align the cuts at the shear line. Torque tools may be oriented vertically (with the handle in line with the keyway) or horizontally (with the handle perpendicular to the keyway); different people have different preferences. The proper pick and torque tool selection depend on the shape of the keyway, the features of the lock, the picking technique, and the individual preferences of the user.

In general, the torque tool should be as thick as possible while still fitting in the keyway, and of a width sufficient to provide good control but without interfering with the picking tool's access to the pins. The tool must have a good fit to be effective, however. 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. Most wafer locks are made to very loose tolerances and have relatively open keyways, however, and are very easy to pick. These imperfections are very small -- as little as .0001 inches in some cases -- but they are what allow us to manipulate ("pick") locks open without using the correct key. Repeat this exercise until you can reliably distinguish between a binding and a non-binding pin with very little lifting. Any ball on the table can be pocketed, and each ball pocketed successfully earns the player one point. On a given turn, the rules determine which ball can be pocketed. While many of the principles of pin tumbler lock picking apply or can be adapted to other mechanical lock designs, a complete discussion of these locks and techniques for defeating them is beyond the scope of this document.