Using your GearWrench 81916 set is easy. First, pick the right size wrench for your fastener. You can quickly identify the size by looking at the stamped markings on the open - end head and the beam. Place the wrench on the fastener, making sure it fits snugly. If you're using the box end, the 15° offset will help you reach the fastener better, especially in tight spaces. Then, apply force to turn the fastener. The off - corner loading design will give you a strong grip and more torque. When it comes to maintenance, just wipe the wrenches clean with a dry cloth after each use. The chrome finish resists corrosion, but it's still a good idea to keep them in a dry place. Store the wrenches in the included tool roll to keep them organized and protected. Remember, this set has a limited lifetime warranty, but avoid using the wrenches on fasteners that are too large or hard for them, as this could damage the tools.