A trigger snap is different from a bolt snap or an all purpose snap because it has a little lever, or trigger, which opens the snap. The trigger makes it easy to open and close the snap with just one hand.

It also has overlapping pieces which make for a more secure hold, rather than a bolt snap. It is very hard for anything to slip through a trigger snap. The built-in trigger mechanism will not release accidentally – only when purposeful force is applied to it, which sets it apart from a bolt snap.