Quick disconnect fastener with self locking ring that snaps into place. Carbon steel construction, zinc plated to resist rust and corrosion. Includes: 16 pc 3/16” x 1 7/16”, 18 pc 1/4” x 1-3/4”, 6 pc 5/16” x 1-3/4”, 10 pc 7/16” x 1-3/4”.