Definition - What does Panic Snap mean?
A panic snap is a type of fastener used to attach restraints used in BDSM play together to ensure a quick release should the submissive feel uncomfortable or require immediate release. Also, unlike other types of fittings, panic snaps can be disconnected under load. Panic snaps were originally invented to attach horse leads to harnesses.
Kinkly explains Panic Snap
Panic snaps aren't recommended for suspension play because they release immediately, which could mean dropping a submissive partner from some height onto the floor. They are best used for standing bondage positions, and can be unclasped with just a bit of finger pressure.