Slam Latches
Slam latches use a spring and are activated by the shutting or slamming of a door shut. Like all latches, a slam latch is a mechanism used to hold a door closed. These latches operate fairly simply: the door shut is pushed shut to latch it or pulled open to release the latch.
Slam latches derive their name from their ability to slam doors and drawers shut without damaging the latch. Because they are so rugged, slam latches are ideal for industrial, agricultural, and construction applications.