clasp \clasp\, n.
   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.
      1913 webster

   2. a close embrace; a throwing of the arms around; a
      grasping, as with the hand.
      1913 webster

   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.
      1913 webster
see also:
clasp knife clasp lock