Feature:1. [Durable Material] Made of heat treated black chromium molybdenum steel, which is durable, wear resistant, and can be used for a long time.2. [Specifications] Socket adapter set includes a 1/4 inch, 1/2 inch and 3/8 inch extension plugs that can be used as drill plug adapters, to meet your various need.3. [Corrosion Resistance] With high quality black phosphate protective coating, it can prevent corrosion and dirt, suitable for impact and hand tools.4. [360 Degree Flexible Joint] Each socket adapter has a complete 360 degree flexible joint, allowing you to arrive difficult to arrive angles, so you can use it with confidence.5. [Provide More Coverage] The U shaped joint adopts a rotating design, with exquisite workmanship, provide more coverage for your drilling operations.Specification:Item Type: Socket AdapterMaterial: Chromium Molybdenum SteelProduct Specifications: 1/2, 1/4, 3/8Product Size: Approx. 70 x 27 x 12.5 mm / 2.8 x 1.1 x 0.5 in, 44 x 15 x 6.35 mm / 1.7 x 0.6 x 0.3 in, 53 x 22 x 10 mm / 2.1 x 0.9 x 0.4 inWeight: Approx. 282g / 9.9oz.Package List:3 x Socket Adapter