Made of cold-forged chrome-vanadium steel to improve the properties, strengthen the material and make each socket's dimensions highly accurateCoated in black oxide finish to increase toughness, reinforcing the steel and making it highly resistant to corrosion6-Point lock on design provides a solid pinless connection to distribute professional strength, high torque and prevents stripping and rounding of fastenersWorks with impact drivers or manual drive toolsHigh visibility laser etching of size and part number for easy identification, even in low light
