Kit includes form fitted storage case & spreader plus 4 EACH the following spring clamps; * 1/2" to 3/4", 11/16" to 1", 1" to 1-3/8", 7/8" to 1-3/16", 1-3/4" to 2-3/16", 2-1/2" to 3" * The quickest and easiest way to clamp mitered corners. * Great for moldings, trim and frames. * Use the spreader to open and position the spring clamp.