GP1598HC Features: -Made of high quality steel (chrome-molybdenum). -Made to transfer the pressure from the thinnest part of the socket wall toward the thicker section, resulting in increased strength. -Packaged in a molded storage case. -18 Piece 1/2'''' Drive Combo Hex Fractional and Metric Impact Socket Set. Dimensions: Overall Height - Top to Bottom: -2 Inches. Overall Width - Side to Side: -5 Inches. Overall Product Weight: -6.85 Pounds.