General description For loosening defective nuts and bolts, this spiral socket wrench set features an innovative spiral profile that penetrates the screw head, allowing for loosening even when the hexagon is damaged. The set includes an additional hexagonal male part on the gear for enhanced functionality. Technical specifications Socket wrench inserts: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 19 mm Transmission: 10 mm (3/8") external square Other information Comes in an aluminum box