Black oxide finish for maximum protection against corrosion. Chrome molybdenum alloy steel for strength and durability. Off-corner loading reduces fastener rounding. GEARWRENCH offers a wide range of impact sockets in open stock and sets that are designed to deliver the performance and strength that the professional users require. They are made from chrome molybdenum alloy steel for exceptional strength and durability. Sockets have a manganese phosphate coating to resist corrosion. The sockets also feature highly visible laser etched markings and a secondary size hard stamping. The sockets feature off-corner loading to reduce fastener rounding. The GEARWRENCH impact product family will allow the professional user to FORGE AHEAD. Chrome molybdenum alloy steel (Cr-Mo) for exceptional strengthand durability. Off-corner loading design reduces fastener rounding. Black oxide finish to resist corrosion. High-visibility laser-etched markings provide quick size identification. Secondary hard stamped size markings.