The World Famous Crescent Brand Tool Sets Contain a Carefully Selected Assortment of Crescent Brand Flare Nut Wrenches. All Tools in This Set Meet New ANSI and ASME Specifications and Come with a Full Satisfaction . Crescent, Providing Quality Tools since 1907. Set Includes: 3/8" x 7/16", 1/2" x 9/16" & 5/8" x 11/16".