The universal swivel impact socket has a 30 degree working angle and rotates 360 degrees, letting you reach and apply torque power to fasteners even in tight spots Premium Chrome Molybdenum steel tempered with our proprietary heat treatment process to withstand more torque from power tools 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 6-point WaveDrive design grips fasteners more tightly than traditional design, preventing fastener rounding and giving you more leverage Size: 15 mm