These ITL 19 Piece ½ Inch Drive Socket Set's are fully insulated and exceed international standards. They have a lifetime guarantee on the tool and insulation, and are supplied in a case.The set are manufactured from injection moulded nylon thermoplastic, and 100% tested to IEC6900, Category C and ASTMF1505. They are designed to withstand extreme impact, abrasion and are flame retardant.ITL tools are 100% tested using1000 volts for 3 minutes, submerged in water. They are Category C Impact Tested for operation within a greater temperature range -40ºF to +158ºF, -40ºC to +70ºC. Set Contains:  8 x Metric Sockets: 8, 10, 13, 17, 19, 20, 22 and 25mm.8 x Imperial Sockets: 3/8, 7/16, 1/2, 9/16, 3/4, 7/8, 15/16 and 1in AF.1 x 1/2in Reversible Ratchet.1 x 5in (127mm) Extension Bar.1 x 10in (254mm) Extension Bar.  Additional Information:Type: Socket Set