*KeyFeatures *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. 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 15pcs 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 15pcs metric deep impact sockets: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, offering a versatile selection for various mechanical tasks. ******************************************************************************************************* *Specifications Item Model Number: SX38D15000 Quantity: 15 PCS Material: CR-MO Alloy Steel Hardness: HRC42-48 Storage Box Size: 11.6 x 5.9 x 2.1 in / 295 x 150 x 54 mm Net Weight: 5.1 lbs / 2.3 kg ******************************************************************************************************* *Pakcage Content 15 x Metric Deep Sockets 1 x Toolbox 1 x User Manual