This high-quality Proto Professional 4990-5M socket is a must-have for any mechanic or DIY enthusiast. With a 3/8″ drive size and a 5mm extra long hex bit, this socket is perfect for those hard-to-reach places. The chrome finish provides durability and corrosion resistance, making it a reliable choice for any project. The socket is a single item and is part of the Metric system of measurement. It is designed with a standard socket type and a hex/allen drive type. The manufacturer part number is 4990-5M. Add this socket to your collection today and take your projects to the next level. If you have any questions please send me a message.