The ITL 13 Piece Insulated 1/2in Drive Socket Set. The tools in this set are manufactured from injection moulded nylon thermoplastic, and are 100% tested to IEC60900, Category C and ASTMF1505. They are designed to withstand extreme impact, abrasion, and are flame retardant. ITL tools are 100% tested using 1000 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. Supplied in a case, contains: 10 x Imperial Sockets: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8in AF. 1 x 1/2in Reversible Ratchet. 2 x Extension Bars: 127mm (5in), 250mm (10in).