The double open-end wrenches are made from high-quality chrome vanadium steel and are chrome-plated. They are therefore very robust and durable. The jaw openings are angled at 15°, which allows better access to screws that are difficult to reach. The wrenches have a U-shaped shaft, which makes them very comfortable to use. The size marking is large and on one side so that the wrenches are easy to identify even in poor lighting conditions.