Power/Impact Socket Wrenches are drop forged from steel bar. These wrenches are available in drive sizes of 3/8", ?", _", 1" and 1-1/2". These sockets have a 6 point opening. They are available in Industrial Black finish. These special purpose wrenches are designed for use in a wide range of sizes and capacities. All have square drives, and drive size is a measure of capacity. As detachable socket wrenches provide an almost endless combination of handles, attachments and sockets, it is possible to assemble a proper tool for almost any type of service within the tool's capacity.