Ilco 220-53-51 Night Latch lock. Surface mount lock has key on the outside and thumb turn on the inside. Spring latch locks automatically when door is shut. Bolt hold open feature. Lock cylinder is 5 pin Kwikset KW1 keyway. Lock body measures 2 1/4" high and 3 1/2" long. Lock includes surface mount strike, outside cylinder, mounting screws, instructions and 2 brass keys.