21 piece set is made in the U.S.A., featuring SK's high polish SuperKrome finish®, which protects the tools from the harsh working environments found in today's workplace, while providing long life and maximum corrosion resistance.SureGrip® hex design drives the side of the fastener, not the cornerMade in the USA12 Point SuperKrome® Long Pattern Combination Wrenches - 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1'1/16", 1'1/8", 1'3/16", 1'1/4", 1'5/16", 1'3/8", 1'7/16", 1'1/2"