The MAC TOOLS AJ12B 12" Black Oxide Adjustable Wrench is a high-quality hand tool designed and manufactured in the United States by Mac Tools. With a size of 1/2 inch, this single item wrench is durable and reliable for various automotive and mechanical tasks. The black oxide finish adds corrosion resistance, making it a long-lasting piece for any toolbox. Its adjustable design allows for precise and versatile tightening and loosening of nuts and bolts. Made in the USA, this adjustable wrench is a top choice for professionals and DIY enthusiasts alike.