Sunex 3500 3/8 Inch Drive Impact Extension Set, 4 Piece

Cr-mo steel: provides the strength and flexibility to handle high torque impact tools. Radius corner design: reduces wear and increases torque on fasteners by placing force on fastener walls rather than fastener corners. Steel ball retainer: designed on male end. Dual size markings: laser etched and roll stamped markings to ensure permanent identification. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 2.7 pounds, Manufacturer: Sunex International