Durable outer sleeve and insert protects high polished wheels and lug nuts from damageChrome-molybdenum alloy steel for long lifeHeavy duty blow molded caseFully Guaranteed Set includes: SAE sizes 3/4"; (light green), 13/16"; (purple), 7/8"; (green), 15/16"; (brown), 1"; (silver), 1-1/16"; (black) and Metric sizes 17mm (blue), 19mm (yellow) and 21mm (red).