Cr-V Industrial-Grade Alloy Steel: Crafted from premium impact-grade alloy steel, our 3/8 impact socket set with Cr-V industrial-grade alloy steel offers exceptional enhancements in impact resistance and absorption. Through the utilization of vacuum heat treatment, the steel undergoes rapid heating and cooling processes, resulting in a polished and highly durable surface. This makes it well-suited for a wide range of operational environments. High Torque: Distinguished by its hexagonal drive design, which sets it apart from traditional designs lacking rounded corners, this socket tool set significantly reduces pressure exerted on fasteners during impact. As a result, it minimizes wear and effectively prevents bolt rounding and stripping. Easy-to-Read Size Markings: The size markings on these 48pcs impact driver socket set are meticulously laser-etched and rolled, ensuring effortless identification of socket sizes even in low light conditions. Convenient Storage Transportation: The set is accompanied by a moderate-weight metal toolbox, providing convenient portability. The toolbox facilitates organized storage of the tools after use, eliminating the risk of unnecessary scattering or loss. Abundant Components: This comprehensive set includes an array of components, such as deep and standard sockets 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4". Other components include extension bars in lengths of 3"and 6", 3/8" universal adapter, and 1/2"F x 3/8"M adapter.