Abstract: A bar type lock mechanism including a locking bar for selectively locking a door having a first edge and a second edge, wherein one of the edges is positioned adjacent a striker plate when the door is closed. The locking bar includes a first end having a locking portion and a second end having a handle portion. A frame assembly secured to the door is provided for slidably and rotatably supporting the locking bar for movement between a retracted position and a projected position. The frame assembly is adjustable to advantageously accommodate doors of different widths. The locking portion of the locking bar is provided with a flattened side as well as a curved side. When the locking bar is first placed in its projected position, the flattened side of the locking portion contacts the striker plate. Afterwards, the locking bar can be rotated to its curved side to generate a camming action thereby more securely closing the door.