Grey Pneumatic (1642RD 3/8" Drive 42-Piece 12-Point Standard/Deep SAE/Metric Socket Set Made of high quality steel (chrome-molybdenum) Engineered specifically for use with impact tools, using the most up to date industrial specifications Made to transfer the pressure from the thinnest part of the socket wall toward the thicker section, resulting in increased strength Comes in a molded storage case Lifetime warranty