Amazon
Chrome Molybdenum Alloy Steel (Cr-Mo) for Exceptional Strength and Durability Surface Drive Technology Reduces Fastener Rounding Manganese Phosphate Coating to Resist Corrosion High Visibility Laser Etched Markings Secondary Hard Stamping, Weight: 2.07 Pounds, Manufacturer: Cooper Tools
Amazon MarketplaceChrome Molybdenum Alloy Steel (Cr-Mo) for Exceptional Strength and Durability Surface Drive Technology Reduces Fastener Rounding Manganese Phosphate Coating to Resist Corrosion High Visibility Laser Etched Markings Secondary Hard Stamping