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As the peaks hit the pin stacks, energy is transferred from the bottom pins to the top pins, much like the action of the cue ball in billiards. When the energy transfers, the top pin moves up while the bottom pin slows down, and a gap is created between the two pins. If serrated bottom pins are used as well (as they are in, e.g., certain American brand padlocks), snap guns, bump keys, or sawtooth raking are likely the only picking techniques that will succeed, especially for the novice. Snap guns are occasionally successful as well. These locks are unusual in not requiring springs on the individual tumblers and are therefore especially well suited to outdoor use under extreme conditions. Eventually, you'll be able to comfortably pick the locks with five and six pins installed. Pool is a group of cue sports that are played with cue sticks but on a table with six pockets along the rails where balls are dropped. Keep in mind that these two other balls are already on the table and that the cue balls are white and yellow.

Pockets: Carom billiards tables do not have pockets at all, as the game does not involve potting balls but rather focuses on hitting object balls in a specific manner. Billiards, sometimes called carom billiards, is among one of the cue sports which refer to games played with cue sticks on tables without pockets. The game of carom billiards is still played primarily in France and other European countries and to a lesser degree in the United States and has many players in Japan, Indonesia, the Philippines, Taiwan, and South Korea and in Central America, South America, Africa, and the Middle East. Many countries-among them France, England, China, Italy, and Spain-have been credited with the invention of the game, but, in fact, nothing is really known about the origin of billiards. However, the design of the cylinder requires the use of special tools to manipulate the pins and apply torque. Picking lever locks generally requires different tools from those used for pin tumbler locks, and high security lever locks often require specialized purpose-made tools. This technique requires a great deal of practice to master, but has the surprising property of sometimes being more effective against better made locks. Schlage Primus locks also use a sidebar.

Schlage SC is a very common keyway. When you've mastered the SX locks, try the "Schlage SC" keyway locks. The training locks in the lab are a good start, but you will probably learn more quickly if you have access to your own personal practice locks as well. 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). The pin stacks with regular pins will feel just as you'd expect, with a hard stop when the bottom pin hits the shear line. Pin stacks with partially set spool and mushrooms, on the other hand, will feel a bit different. Finally, lift the pin that sets first very high before you apply torque. Now release torque and try again, but this time lift the pins as little as you can when you test them, what is billiards while still distinguishing between the two states. It becomes distinguishable from an unset/binding pin stack when you try to set it; while it binds, it does not set, no matter how much further it is lifted. In particular, you should feel when you set a pin as much in the torque tool as you do in the pick.

It feels much as it does when binding and unset, but will not set (since a binding pin can only move up, not down). Now the plug is being prevented from moving by the next most misaligned pin (which, in this case, is the other pin, since there are only two). SFIC cylinders (such as those made by Best), used in large institutional lock systems, employ a similar mechanism to provide two kinds of keys: regular keys that operate the lock and control keys that unlock and remove the cylinder core itself. In the United States, disk tumbler cylinders are used primarily for padlocks situated in harsh environments, especially by public utilities and railroads. 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. High security locks are more routinely installed in Europe than they are in the United States. Their security ranges from being quite rudimentary to being among the most formidable locks in commercial use. High-security locks often incorporate one or more secondary locking mechanisms beyond that provided by the conventional pin tumblers.