Professionals worldwide prefer Proto Industrial Tools for their outstanding quality durability and dependability. Professionals for heavy-duty industrial applications including auto-manufacturing plants steel and airplane manufacturing chemical plants refineries general manufacturing transportation and fleet maintenance for trucking transit and aircraft use Proto Industrial Tools. With a global distribution network Proto Industrial Tools are available on-the-job anywhere in the world. Drive Size: 1/2".Drive Type: Square.Tip Size: 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 17 mm.Tip Type: Hex.Includes: Socket Bar, Socket Clips.Material: Forged Alloy Steel.Finish: Black Oxide.Measuring System: Metric.Locking Type: Pin.Quantity: 6 per bar.