The GEARWRENCH 12-pc 3/8" Drive 6-Point Hi-Viz Impact Socket Set is designed for durability and ease of use. Made from chrome molybdenum alloy steel (Cr-Mo), it offers strength and longevity. Large, ink-filled stamped size markings are up to 50 percent more visible than traditional markings, with a 20 percent larger stamping size for quick identification, says the company. Featuring an off-corner loading design to reduce fastener rounding and an industrial black finish for corrosion resistance, it meets or exceeds ASME specifications.