The Peterson "Reach" deep curve pick works well for this keyway, pivoting from the bottom of the keyway at the front. 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. 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 can rotate freely only if the key lifts every pin stack's cut to align at the border between the plug and shell. 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.
Right: Side view, with part of the shell and plug cut away to expose the six pin stacks. The game is played with 22 balls, made up of one white ball (the cue ball), 15 red balls, and six numbered coloured balls including one yellow 2, one green 3, one brown 4, one blue 5, one pink 6, and one black (valued at 7 points). Find the board with the six "Arrow AR1" keyway locks. Go back to the "Arrow AR1" keyway lock board and find the one pin lock. Picking tools are designed to perform one of two basic functions: manipulating pins and turning the plug. From the attacker's perspective, too, lock picking is rarely the most efficient, most economical, fastest, or easiest method of entry. And of course there is the surest and fastest method of all: the use of the correct key. 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. Right: With all of the cuts at the shear line, the plug can rotate freely within the shell. Left: The correct key lifts the pin stacks to align the cuts at the shear line.
The multiple peaks allow several, or even all, pin stacks to set simultaneously. Falle-Safe Security makes a set of vertically-oriented two-prong torque tools designed to fit snugly in a range of different pin tumbler keyways. Lock picking is a core skill of the locksmithing trade and is also of value to those evaluating, investigating, and studying security systems. Lock picking is useful and worth studying for its generality and simplicity. Pin tumbler lock picking consists of raising the cuts on each pin stack to the shear line, one by one, until the plug turns freely. 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. If you tried to rotate the plug of such a lock without a key in the keyway, the top pin segment of each pin stack would block the plug at exactly the same number of degrees of rotation; each pin stack would contribute equally to preventing the plug from turning. 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.
Very "wavy" rake picks can simulate various key profiles, and can be surprisingly successful at opening poorly-made locks. The picks are made by Peterson International (a locksmithing tool vendor in upstate New York with manufacturing facilities in South Africa). 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). It is not clear what some of these picks are intended to actually do. Unfortunately, these designs are less than ideal, and many of the "standard" picks are too large to fit and move comfortably in common lock keyways. Unfortunately, many of the commercially available lock pick kits consist mostly of useless gimmicks. Internet sellers typically offer only the cheapest accessory kits and limited cloth colors with their tables. 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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