This 59-piece impact socket set is made of Cr-Mo industrial-grade alloy steel, offering exceptional impact resistance and absorption. The set includes a range of SAE and metric sockets, extension bars, and adapters, making it suitable for various automotive maintenance and repair tasks. The hexagonal drive design reduces pressure on fasteners, minimizing wear and preventing bolt rounding and stripping. The size markings are laser-etched and rolled for easy identification, even in low light conditions. The set comes with a metal toolbox for convenient storage and transportation.