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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. Spring steel or stainless steel, between .020 and .035 inches thick, are typical materials. 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. These skills become very important when picking better quality locks, so take your time here. Take frequent breaks, and don't try to complete the whole course in one day. And of course there is the surest and fastest method of all: the use of the correct key. Patrons file onto the course after the gates are opened near the first fairway before the start of the 80th Masters Golf Tournament at the Augusta National Golf Club. Lee Westwood of England chips on the second hole during the first round of the 80th Masters Golf Tournament at the Augusta National Golf Club. The disks are connected in sequence via interlocking cams such that one rotation of the dial engages the first disk, two rotations engage the second, what is billiards and so on.

The top pin of that pin stack will be trapped above the shear line, the bottom pin will fall freely, and now a new pin stack (the next most misaligned one) prevents further rotation. The tool should amplify, not dampen, the rotation of the plug. Here the plug has been turned slightly toward the camera, so that the tops of the pins in the plug are visible. Worse, they often omit the designs that are of the most practical value. Over the years, the locksmithing industry has settled on a number of "standard" pick designs. The selection of the torque tool is just as important as that of the pick, but, again, commercial pick kits often fail to include a sufficient range of sizes and designs to allow good control and feel across the range of common locks. 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. Other classes of attack, not discussed here but at least as worthy of study and scrutiny, include lock decoding, which is concerned with producing a working key based only on access to the external interface of the lock, lock bypass, which aims to unlatch the underlying locking mechanism without operating the lock at all, and forced entry, which, as the term suggests, involves the destructive application of force to the lock or its surroundings.

Lever locks employ a set of "lever" tumblers raised to a specific height by the key bitting. 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. 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. Many inexpensive locks, especially low-security "cam" locks such as those used to secure furniture and cabinets, do not use pin stacks for their tumblers. However, note that because the tumblers are a single piece, sawtooth raking, snap guns, and bump keys are not effective against them. For most of the picking methods discussed here, in which tumblers are manipulated one by one, a "hook"-style pick is generally used. You may find one of the smaller LAB hook picks to be easier here than the larger Peterson picks, although you can usually still pick this keyway with the small Peterson hook. If the shear line is within this gap as torque is applied, it may set. 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.

Each pin stack is cut in one or more places perpendicular to its length. Left: Cylinder face, the lock's "user interface." Note the keyway, which is cut into the plug, which in turn sits inside the shell. While the pin tumbler cylinder is by far the most popular door locking mechanism in the United States, it is not the only kind of keyed lock in common use. Eight Ball is a call shot game played with a cue ball and fifteen object balls, numbered 1 through 15. One player must pocket balls of the group numbered 1 through 7 (solid colors), while the other player has 9 thru 15 (stripes). Chalk in small cubes is applied uniformly to the cue tip permitting the players to strike the cue ball off centre on purpose in order to impart a spinning motion, called "side" in Great Britain and "English" in the United States.