National Hardware 3.62 in. H X 6.25 in. W X 7.33 in. L Steel Left or Right Handed Door/Gate Latch

Door latches are a type of mechanical hardware used to fasten doors and keep them shut. A door latch uses a fastener attached to two ordinarily separated surfaces, most often the door and the frame, to prevent the door from swinging while still allowing normal operation when the latch is released.