This extension bar is made of high quality material. Characterized by high hardness and strength, easy to store and use. A great choice for you. Features: Made of high quality chrome-vanadium steel, this product is sturdy and durable. Use with ratchet handle for hard to reach areas. Integral heat treatment with bright chromium plating, high hardness and strength. Lightweight and small size, easy to store and use. It can be a great choice for all users. Specification: Condition: 100% Brand New Item Type: Extension Bar Material: Chrome-Vanadium Steel Color: Silver Style: Short, Medium, Long, Full Set ( Optional ) Interface size: 1/2inch (12.6mm) Length: Approx. 78mm / 3.1inch (Short), 125mm / 4.9inch (Medium), 250mm / 9.8inch (Long)( Optional ) Package Weight: Approx. 700g Package List: 1 * 1/2inch Extension Bar