Features Made of high‑carbon steel material, has good wear resistance and toughness, and has a long service life. The socket adapter is integrally formed, with glossy exterior without burrs, and smoother installation. The surface of the adapter is coated with anti-corrosion paint, which not only improves the smoothness but also is more durable. The adapter is 1/2 to 3/8 specifications, choose the right ratchet wrench and screwdriver bit will not easily slip off. The adapter kit is mainly used to assist the ratchet wrench to tighten the screws, easy to install and replace, Specification: Item Type: Socket Adapter Material: High carbon steel Head Length: Approx. 9.5mm / 0.4in Inner Diameter: Approx. 12.5mm / 0.5in Outer Diameter: Approx. 22mm / 0.9in Total Length: Approx. 35mm / 1.4in Package List:2 x Socket Adapter Package List 2 x Socket Adapter