Using this DeWalt ratcheting combination wrench is easy. First, pick the right size by looking at the stamped markings on the handle. When you need to turn a fastener, just place the wrench on it. The 72 - tooth design allows for a 5 - degree arc swing, so you can work in tight spaces. The 15 - degree offset open end gives you even more flexibility in confined areas. To avoid rounding the fasteners, the wrench uses DirectTorque™ technology. Make sure to clean the wrench after each use. You can use a simple cloth to wipe off dirt and debris. Keep it in a dry place to prevent rust, especially since it has a full - polish chrome finish. If you have any issues, remember it comes with a full lifetime warranty, so you're covered.