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Left: Cylinder face, the lock's "user interface." Note the keyway, which is cut into the plug, which in turn sits inside the shell. The proper pick and torque tool selection depend on the shape of the keyway, the features of the lock, the picking technique, what is billiards and the individual preferences of the user. It is important to develop a "mental image" of the internal state of the lock, the locations of the pins and your pick, etc, as you manipulate the pins. Using the five or six pin lock, find a pick that lets you locate and lift each pin across its full range of motion without disturbing adjacent pins too much. You should be able to confidently find each pin and push it all the way up, without jamming the pick against anything or moving other pins. Figure 2. Pin tumbler lock with a correct key inserted. 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. 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. Surreptitious entry (e.g., for espionage or law enforcement surveillance) is likewise often best accomplished by obtaining a key or through the use of specialized decoding or bypass tools designed to quickly and quietly defeat the locks used by the target.

Two tools -- one for each function -- are used simultaneously when picking a lock. Each pin stack is cut in one or more places perpendicular to its length. Most pin tumbler cylinders can be "master keyed" to allow more than one key bitting to operate it. Left: The correct key lifts the pin stacks to align the cuts at the shear line. While pins are usually set by raising the cut from the plug to the shear line, they can also be picked by first oversetting the cut to within the shell and then lowering it to the shear line. If just one pin sets at the "other" shear line, the lock will not open even though all the pin stacks are picked. Tubular locks suffer from the same manufacturing imperfections as other locks and so can be picked with essentially the same techniques. These locks must be picked at both the top and the bottom, sometimes alternating between them. Another style of torque tool has two "prongs" that fit in the top and bottom of the keyway, with a cutout between them for the pick.

The Peterson picks are more sturdy, at the expense of being bulkier (but they still fit easily in many of the keyways you'll be picking). While there are literally thousands of different keyways in commercial use in the United States and thousands more abroad, these four give a fairly representative sample of the different kinds of wardings (and pin manipulation problems) you are likely to encounter in common (non-high-security) locks. The name of Ewart Astill will be familiar to those of us of a certain age who, in childhood and adolescence, were regular readers of Wisden, more particularly its records section. Note that excessive raking with any of these techniques will tend to overset pins, so be prepared to release torque and start over from time to time. The following is a series of self-paced exercises to help you master the basic techniques of pin tumbler lock picking. Other lock types include "European profile" cylinders, master keyed locks, master ring and SFIC cylinders, tubular pin tumbler locks, dimple-key pin tumbler locks, pin tumbler locks with secondary locking mechanisms, wafer tumbler locks, disk tumbler locks, lever tumbler locks, combination locks, and electronic 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. It's hard to learn these skills all at once on off-the-shelf commercial locks, but that's what many people who try to learn lock picking end up doing (before giving up in frustration). Well, some people say, "We go to the concert to improve our minds." Well, if you do that, you’re not listening. And also, there’s another way in which you’re playing with the air: lungs. Well, we’ve got all kinds of weird theories that ferns exist in a certain way in order to propagate themselves. They have all kinds of very straight lines drawn across what is essentially an extremely wiggly-surfaced globe. Now, what I suggest you do is this: have yourself seated with your backs as straight as possible, but not stiff. Well, now, you see, you’ve got to realize that we think of the world largely in terms of Newtonian mechanics. We think ordinarily of the present as an infinitesimal point at which the future changes into the past. The keyway is relatively open and easy to move a pick through, making it a good starting point.