A master set of both SAE and Metric size impact sockets comes with both long and short lengths to cater various needs at professional mechanical works. A universal joint is included for users to have better access to all the sockets with either standard or deep. Made of high-grade Chrome Molybdenum Steel, these are specially heat tempered to achieve impact property and beyond ANSI standards. Black manganese phosphate finish to ensure top corrosion resistance with non-slippery surface. Every piece is securely placed in a robust PE-HD BMC for easy transport and storage.