Features & Details Cr-Mo Industrial-Grade Alloy Steel: Crafted from premium impact-grade alloy steel, our 3/8" impact socket set with Cr-Mo 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. 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. Clear Size Markings: The size markings on these 15pcs impact driver socket set are meticulously laser-etched and rolled, ensuring effortless identification of socket sizes even in low light conditions. Effortless Organization: Keep your sockets neatly arranged with the provided socket organizer. It has clear size markings for easy identification, making it easy to find the right socket. Tidy your workspace and ensure you don't lose any sockets again. Abundant Components: This comprehensive set includes 15pcs metric ultra-short impact sockets: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20nn, 21mm, 22mm, 23mm, 24 mm, offering a versatile selection for various mechanical tasks.