The Proto 7442 1mp 21mm Swivel Impact Socket is a high-quality hand tool designed for automotive use. With a 6-point design and 1/2" drive size, this socket offers durability and reliability for fastening and loosening nuts and bolts. The impact socket features a swivel design, allowing for increased flexibility and access to tight spaces. Manufactured by Proto, a trusted brand in the industry, this socket is a valuable addition to any mechanic's tool collection.