This 1/2" square drive socket with a 21 mm wrench width and 78 mm length offers deep reach for fastening hexagonal nuts in industrial and mechanical applications. Its magnetic feature and suitability for impact screwdrivers enhance efficiency and ease of use. Key features: - 1/2" square drive connection - 21 mm wrench width with 8 mm depth - 78 mm length for extended accessibility - Magnetic for secure nut retention - Compatible with impact screwdrivers and surface protected for durability