Innovative stepped box ends deliver access and clearance. 5 deg ratcheting arc provides great access to fasteners. Fits 6 fastener types - hex, square, 12-point, "E-Torx", rounded hex and spline. Smooth profile allows for more torque to be comfortably applied to the fastener. Each wrench is capable of four sizes - 5/16 in, 3/8 in, 7/16 in, 1/2 in and 9/16 in, 5/8 in, 11/16 in, 3/4 in for a total of 8 sizes in just two wrenches.