Using your GearWrench 81846 combination wrench is easy. First, check the size stamp on the beam to make sure you've got the right size for your fastener. Place the open end or the box end of the wrench onto the fastener, and turn it clockwise or counter - clockwise as needed. Remember, the off - corner loading design gives you a better grip and more torque, so make the most of it. When using the box end, the 15° offset helps you reach fasteners in tight spaces. As for maintenance, after each use, wipe the wrench clean with a dry cloth to prevent dirt and debris from building up. Since it has a satin chrome finish that resists rust, you don't have to worry too much about corrosion, but it's still a good idea to store it in a dry place. Also, keep in mind that this wrench is not adjustable and not tether - ready. If you have any issues, it comes with a limited lifetime warranty, so you're covered.