RIDGID 86927 768 Adjustable Wrench, 18-inch Large Adjustable Wrench for Metric and SAE Made of high grade alloy steel that is forged and heat-treated for maximum strength and durability Wrench features nickel-based plating with a brushed finish to reduce rust and corrosion, extending the life of the tool Jaw scales have etched SAE and metric graduations for quick and easy adjustments and improved productivity 18-inch (450 mm) large adjustable wrench has a 2-1/8-inch (50 mm) jaw opening for use on a variety of fastener sizes RIDGID covers its products with a lifetime warranty against defects in material or workmanship for the life of the tool