The Deep Socket 21mm X 1/2″ drive Metric 12 Point Chrome Genius is a high-quality hand tool designed for automotive use. This single item socket features a durable chrome finish and a 12 point drive type for easy and precise fastening and loosening of nuts and bolts. The regular size type and metric system of measurement make it a versatile addition to any toolbox, especially for Genius brand enthusiasts looking for reliable and efficient tools.