The unique design of the Powerbuilt universal sockets allows each socket to be used on all common types of fasteners SAE, Metric, Hex, 6 Point, 12 Point, E-Torx, Spline, and Square types. This allows you to carry less tools with a wider range of applications. This Powerbuilt Universal Socket Set also features the new Powerbuilt Industrial Dual finish giving the sockets and tools a new look with more Versatility and Durability.