The Tenma 76-103 is a set of ten pieces of socket wrenches, mostly metric, made of chrome vanadium steel, heat treated for durability and strength, and featuring a plastic handle for a secure and comfortable grip. This set includes 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, and 19mm sockets. It also includes a 13 piece extension bar set, so that you can access hard to reach areas. The sockets also feature a tapered design, which helps to reduce slippage and make them easier to use. This set is ideal for repairing or maintaining mechanical and automotive systems.