. Constructed of durable and heavy-duty chrome vanadium steel, this socket has the strength required for high torque jobs and will fit onto any 1/4-inch drive electric or pneumatic impact wrench, ratchet, torque wrench, extension bar, or adapter. 1/4" Drive x 11mm Deep 6-Point Metric Single Socket A ball detent recess on the base of the socket holds it securely to attached tools to allow for use at any angle.Rated to meet or exceed ANSI / ASME performance requirements for hand tools, these can handle tough use in any professional or home shop / garage.