Kielder 1/2" Deep Impact Socket Set - 17, 19, 21mm (3PC)Contains: 17, 19 & 21mm Sockets, plus holder for convenient storage in a tool box or cabinet drawer. Manufactured from high quality Chrome Molybdenum steel, offering increased durability Strong and robust inner wall, whilst still maintaining slimline outer diameter for easy access to sunken wheel nuts 80mm Length Even weight distribution along the socket length to impart maximum impact Ideal accessory with Kielder 1 2" 18v Impact Wrenches and