The Tolsen 16520 is a 20mm socket designed for use with 1/2" drive tools such as ratchets, breaker bars, and torque wrenches. It is crafted from 50BV30 chrome vanadium steel with a polished chrome finish, ensuring the tool meets DIN3124 and ISO2725-1 standards for durability and precision. To make your work easier, this socket features an improved head profile that allows you to grip and remove deformed fasteners more effectively. A built-in ball retaining groove keeps the tool securely attached to your handle, providing stability and safety during heavy-duty mechanical tasks.