General description This is a 42mm bi-hexagon socket designed for 3/4-inch square drive applications. It is suitable for professional use and compatible with various tools requiring a bi-hexagon socket. Technical specifications Material: Chrome vanadium steel, hardened and tempered for durability Finish: Chrome plated for corrosion resistance Size: 42mm Drive size: 3/4 inch square drive Standards: Manufactured according to DIN 3124/ISO 2725 and DIN 3120/ISO 1174 Compatibility and accessories Compatible with 3/4-inch drive tools Features a hole for driving accessories with locking pin Some sizes include a knurled band for improved grip Installation Insert the socket onto the corresponding drive tool Ensure it is securely fitted before use Usage Use for tightening or loosening nuts and bolts with a bi-hexagon shape Apply appropriate torque to avoid damage Other information Sold loose, not in a set.