Features:* The bushing is forged with chrome molybdenum steel, and carbon black phosphate treatment is used to enhance protection.* Feature: It is not easy to rust, and the overall forging heat treatment is more durable.* Suitable for use on 3/8" square axle , fits furniture, woodworking installations and pre-installed screws. Specifications: Product Name: Socket Adapter Material: Chrome Molybdenum Steel Color: Black Size: As Shown Optional Type: M6 1.0, M8 1.25, M10 1.5 Connector: 3/ Socket Wrenches 8" Suitable for: furniture, woodworking installations and pre-installed screws. Quantity: 1 pc Package includes: 1 Socket Adapter Note: 1. Transition: 1cm=10mm=0.39 inch.2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.