The Snap-on Tools 16mm 18mm 12pt Metric Double Flex Ratcheting Box Wrench XFRM1618 is a high-quality, specialty hand tool designed for automotive use. Made in the United States, this single item wrench features a double flex design and ratcheting capabilities, making it a versatile and durable option for mechanics. With its 12-point drive type and metric size, this wrench is an essential addition to any toolbox, providing a reliable solution for tight and precise engineering applications. A warning for California Prop 65 compliance is also included with this product.