The Thorsen 540 socket is a vintage tool designed for automotive use. It is a 1-1/4 inch SAE size socket with a 12 point drive type and a 1/2 inch drive size. Made in the United States, this chrome-finished socket features standard dimensions and is a single piece. Perfect for mechanics and car enthusiasts, this Thorsen socket is a high-quality, durable tool for fastening and loosening nuts and bolts.