Clasp

1. An adjustable catch, bent plate, or hook, for holding together two objects or the parts of anything, as the ends of a belt, the covers of a book, etc.
2. A close embrace; a throwing of the arms around; a grasping, as with the hand.
Clasp knife ,
a large knife, the blade of which folds or shuts into the handle.
Clasp lock ,
a lock which closes or secures itself by means of a spring.