This mortised latch is to be used on a small door of a cabinet or chest. The round latch goes inside the door, and the plunger is controlled by the knob. The plunger fits into a keeper that is mounted on the frame of the door.
The mortised cylinder is 1/2 inch round and 1 5/8 inches long. The back plate of the turn knob is oval shaped, 1 7/8 inches long and one inch wide. There are two holes, 1 1/2 inches apart. The knob itself is one inch by 1/2 inch.
The keeper, which receives the plunger, measures 1 1/8 inches by 1/2 inch.
The latch is new-old-stock. It is stamped brass. All needed screws are included.