Features and Benefits: CR-MO Alloy Steel - Forged from high quality alloy steel for maximum strength & durability; Radius Corner Design - Increases fastener engagement , reduces fastener wear; Dual Size Marking - High visibility laser & permanent stamped marking; Packaged in compact blow molded case for durable, convenient storage and transport; Black Phosphate - Offers superior corrosion resistance; Lifetime Warranty - ALL impact sockets, NO exclusions; Heavy-Duty Storage - Stay organized with durable storage case; Performance & Safety - Meets or exceeds ANSI & ASME standards; Includes : 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 32mm, 33mm, 34mm, 35mm, 36mm;