This 3/8-inch square drive socket features a 21 mm wrench width and 13 mm wrench depth, ensuring precise fit and reliable torque transfer for hexagonal nuts. With a length of 30 mm, it is suitable for impact screwdrivers and various mechanical applications. Key features: - Connection size: 3/8 inch square drive - Wrench width: 21 mm for standard hex nuts - Wrench depth: 13 mm for secure engagement - Length: 30 mm for versatile use - Surface protection: Other, suitable for impact screwdriver use