●Includes Socket Storage Snap on Rail for Easy Storage.Each socket has permanent high visibility laser etched size markings for quick size selection during operation. ●Constructed of heat-treated chrome vanadium steel for strength and durability. This impact socket set meets ANSI performance standards. ●5 pc 1/4" Drive Sockets E4, E5, E6, E7, E8 ●6 pc 3/8" Drive Sockets E10, E12, E14, E16, E18, E20 ●E-Sockets Are a Must for Most Newer Vehicles