Features and Benefits:Forged from the finest chrome-molybdenum alloy steel, the best choice for strengthRadius corner design extends the life of fasteners; design drives the side of the fastener instead of the cornerDesign also avoids rounding of rusted or damaged fastenersBlack oxide finish and has etchings for identificationIncluded in a heavy-duty blow mold case This is an Impact Socket Set with 7-piece. Sockets are 3/8 in. Drive and Deep design. Designed to tackle the toughest jobs with solid durability and keeps them pounding job after job.