Premium CR-MO? Made of premium impact grade chrome molybdenum steel construction with black phosphate finish. Set Includes? 4 x 3/8 Dr. Extension Bars- 3″, 6″, 10″, 15″, 1 x 3/8Dr. Impact Universal Joint, 1 x 1/2″ to 3/8″ Aadpter, 9x Star Sockets and 9 x Inverted Star Sockets. Set Includes? 3/8 Dr. Deep/standard in SAE and METRIC from 6mm to 19mm, 1/4-Inch- 3/4-Inch, 3/8Dr. Universal Sockets in SAE and METRIC from 10mm to19mm, 3/8-Inch – 3/4-Inch. High-torque? Radius corner design, 6-point opening reduces wear and increases torque on fasteners by placing force on fastener walls rather than fastener corners. Service? All MIXPOWER Tools meet or exceed ANSI performance standards. It comes with 1 year quality. 1pc-3/8 Impact Universal Joint. 1pc-1/2″ to 3/8″ Impact Socket Adapter. 4pcs-3″, 6″, 10,15” Drive Impact Extension Bar. 9pcs-3/8” Star Sockets: T20, T25, T27, T30, T40, T45, T47, T50, T55. 9pcs-3/8” Inverted Star Sockets: E5, E6, E7, E8, E10, E11, E12, E14, E16. 7pcs-3/8 Universal Impact Sockets (SAE) : 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4. 10pcs-3/8” Universal Impact Sockets(METRIC): 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm. Deep/ standard sockets (SAE) : 1/4″, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4. Deep/standsrd sockets (METRIC): 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm. 1 piece heavy duty blow molded storage case. This MIXPOWER 3/8 Drive Deep Impact Socket Set. This socket is high-contrast laser etched with high-visibility markings and hard stamped with size labels, ensure permanent socket identification. Heavy duty plastic blow-molded carrying case for easy transport, simple storage, and quick organization. Made of premium impact grade chrome molybdenum steel construction with black phosphate finish for durability. Extension bars for reaching deep screw hole. Includes a heavy duty blow molded case to keep your sockets free from dirt and grime when not in use. 1/2 inch(SAE)/ 6 point. 1/2 inch(Metric)/ 6 point. 1/4 inch (SAE/Metric)-6 point. 1/2 inch(Metric)/ 12 point. 17mm, 19mm, 21mm, 22mm, 23mm, 24mm, 27mm. 5/32 Inch – 9/16 Inch, 4mm – 15mm. 29,30 32 34 35,36,38,39mm.