The Capri Tools 1/2 in. Drive Jumbo Deep Impact Socket Set is a collection of most frequently used large size impact sockets in metric sizes. We use premium Chrome Molybdenum steel tempered with our proprietary heat treatment process to make these impact sockets and accessories. They are durable and specifically made to withstand high torque from power tools. Each item is expertly coated with manganese phosphate, the preferred coating in military and aerospace, which offers superior protection and corrosion resistance compared to black oxide coating on other impact sockets. The 6-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage. Meets and exceeds ASME B107.110 standards.