• 3/4" Drive 6 Point Deep Impact Metric Socket 21mm
• Chrome molybdenum alloy steel (Cr-Mo) for exceptional strength and durability
• Off-corner loading design reduces fastener rounding
• Manganese phosphate finish to resist corrosion
• High-visibility laser-etched markings provide quick size identification
• Secondary hard stamped size markings
• Meets or exceeds ASME specifications