General description For loosening defective nuts and screws, this Spiral Socket Set features an innovative spiral profile that penetrates the screw head, allowing it to be loosened even when damaged. The set includes a 10 mm (3/8") male square drive for added versatility. Technical specifications Drive size: 10 mm (3/8") Socket sizes: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 19 mm Other information Comes in an aluminum case for easy storage and transport