The Klein Tools 10" Extra Capacity Adjustable Wrench (D507-10) offers durability and versatility in a variety of applications. The wrench features a forged heat-treated alloy steel construction with a high polish chrome finish that resists corrosion. The extra jaw capacity allows for the use of a smaller size wrench to handle bigger jobs, which is especially useful in confined spaces. The contoured handles ensure maximum comfort, while the precision machined jaws are assembled by hand to ensure smooth operation.