Features: Double headed opening design, multiple specifications to choose from, widely used. Ultra thin structure, suitable for operation in narrow space. High carbon steel material, with high strength, hardness, wear resistance and rust prevention, and can use long time. Ergonomic handle, comfortable to grip without slipping hands. Suitable for car maintenance, furniture assembly, pipe installation and more. Specifications: Material: High-Carbon Steel Opening Size: 5.5-7mm, 8-10mm, 9-11mm, 10-12mm, 12-14mm, 13-15mm, 13-16mm, 14-17mm(optional) 5.5-7mm Full Length: approx. 120mm/4.72inch 8-10mm Full Length: approx. 134mm/5.28inch 9-11mm Full Length: approx. 142mm/5.59inch 10-12mm Full Length: approx. 151mm/5.94inch 12-14mm Full Length: approx. 163mm/6.42inch 13-15mm Full Length: approx. 176mm/6.93inch 13-16mm Full Length: approx. 183mm/7.2inch 14-17mm Full Length: approx. 187mm/7.36inch Package Includes: 1Pc Double Headed Wrench note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.