Product details:

Heat treated CR-440 steel, Direct Torque Technology, Laser etched markings, O-ring and retaining pin compatible, Black oxide coating. Heat treated CR-440 steel for strength and durability. Direct Torque Technology helps prevent rounding of fasteners. Laser etched markings for easier identification on black phosphate finishes. O-ring and retaining pin compatible for added job-site safety. Oil rubbed Black oxide coating for corrosion resistance.