The large board has locks with eight different keyways, representing many of the most common keyway designs used in the US. Worse, they often omit the designs that are of the most practical value. It is always best to practice with your lock mounted to a door or wood platform, as they are here, or at least fixed in a vice. Become comfortable with this before you try picking this lock with torque or you could bend or break your picks. 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). Once you've mastered the AR1 keyway locks, repeat exercises 2 through 6 with the "Ilco SX" keyway locks. When inserted quickly in and out of the keyway and rubbed along the bottoms of the pins, they tend to make each pin stack "jump" rapidly. Do not push up hard against the pins; use just enough pressure to cause the pin stacks to jump. Now release torque and start over, taking care to pick all the pin stacks with spool/mushroom pins while leaving at least one regular pin stack unset (this will require a light touch and good sensitivity).

Using an inverted pick, raise all the pin stacks to their maximum height. Lever locks employ a set of "lever" tumblers raised to a specific height by the key bitting. Some high security locks, such as those manufactured by Abloy and Abus, use round disk tumblers that are rotated into position by a specially designed key bitted with angled cuts corresponding to each tumbler. These are typically pin tumbler locks, but their orientation is "upside down" with respect to the convention for locks installed in the United States. Vertical orientation requires a 90 degree twist in the blade. Reset the lock by returning the plug to the vertical locked position and try again but with torque applied in the other direction. The Y1 keyway is one of the toughest you are likely to encounter in real lock installations in the US. Finally, for a real challenge, try the Yale "Y1" keyway locks. Move your fingers close to the keyway as you do this.

It moves freely up until it reaches the shear line, where it "hits a wall" and can move no further. When the plug turned slightly, it trapped the top pin above the shear line, preventing it from re-entering the plug. 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. If the shear line is within this gap as torque is applied, it may set. These pins falsely set before they reach the shear line. 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. When you reach the shear line, the plug will turn. 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. For most of the picking methods discussed here, in which tumblers are manipulated one by one, a "hook"-style pick is generally used.

High-security locks often incorporate one or more secondary locking mechanisms beyond that provided by the conventional pin tumblers. Most automotive locks use wafer tumblers. This pick is a LAB double-ended "hook/rake" (held for use with the hook end). As with pin tumbler locks, because the levers, gates, and fence are slightly out of alignment, it is usually possible to raise and pick the levers one at time. Figure 2. Pin tumbler lock with a correct key inserted. Although combination lock manipulation exploits some of the same kinds of imperfections as pin tumbler lock picking, the principles and techniques are quite different and are well beyond the scope of this document. LAB is a lock pin and locksmith tool manufacturer. The picks are made by Peterson International (a locksmithing tool vendor in upstate New York with manufacturing facilities in South Africa). While the LAB picks are quite nice, their small size makes them rather delicate and easy to bend or break, especially as you're learning how much lifting force and torque are involved. In particular, you should feel when you set a pin as much in the torque tool as you do in the pick.

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