The Proto 7442 1mp, 21mm Swivel Socket is a high-quality hand tool designed for automotive use. With a 6-point design and 1/2” drive size, this socket is perfect for loosening and tightening nuts and bolts with precision. The swivel feature allows for additional flexibility in tight spaces, making it a versatile addition to any mechanic's toolbox. Known for its durability and reliability, Proto is a trusted brand in the automotive tools and supplies industry.