Features and Benefits: Manufactured from chrome-moly steel for wear in professional, rugged environments; Heat treated for additional strength and durability; Each socket is laser engraved for easy identification; 6 point deep design for use with 3/8" drive tools; Sizes include: 3/8" thru 7/8".; Nine-piece fractional impact set is manufactured from heat-treated chrome-moly steel for wear in professional, rugged environments. Set includes deep sockets sized from 3/8""-7/8"". All are 6-point 3/8" in. drive. Laser engraved for quick identification. Carded on socket rail.