The World Famous Crescent Brand Tool Sets Contain a Carefully Selected Assortment of 3/8" drive Crescent Brand Hex Bit Sockets. All Tools in This Set Meet New ANSI and ASME Specifications and Come with a Full Satisfaction Guarantee. Crescent, Providing Quality Tools since 1907. Set Includes sizes: 3, 4, 5, 6, 7, 8, 10 mm & Storage Rack.