A clasp for releasably holding opposed ends of an elongated filament element. The clasp includes a housing having opposed sides each having a receiving port for accommodating respective opposed ends of the elongated filament element, and an open center chamber, a slide member received in the open center chamber of the housing, including opposed walls that each have a locking aperture, having an open center passage, and an end actuation button having locked and released positions, a locking disc engaged between the slide member and housing, and a spring disposed within the open center passage of the slide member and positioned between the locking disc and the end actuation button.