The TuBAR is manufactured by Chicago Lock, a company who is known for several other designs, including the infamous Duo. This specific cylinder is designed for vending machines, and in my opinion is much better than the standard tubular locks seen on a lot of machines. The face of the lock shows a keyway and the 8 pins, the key can only enter the keyway in one direction. The key has 8 different cuts that vary in depth, each cut depresses its pin to its own depth. The pins in this lock on not split, the only thing keeping the cylinder from rotating is the sidebar. Each pin has several false gates, and one true gate that the sidebar “crescent” can fall into. The pins are held in place by very strong springs, which make manipulating the lock extremely difficult, as the pins have a lot of pressure on them, so they don’t stay set. The face of the lock is actually a separate part from the rest of the pin chambers, it is made of a harder metal than the rest of the brass body. When the lock is opened, the key is retained by a small lip inside of the lock housing, which also has a groove cut into it to hold the sidebar. The sidebar comes in two parts, there is the crescent, which interacts with the gates on the pins, and then there is the actual locking bar which keeps the lock from rotating until the crescents have fallen into place.