Use for quick, but secure tightening applications without tools * Includes sizes: 30 pc 10 x 24 (3/16") threads, 30 pc 1/4" x 20 threads * 30 pc 1/4" x 28 threads, 30 pc 5/16" x 18 threads * 25 pc 5/16" x 24 threads * Plastic Storage Box