Features and Benefits:

• Services transfer cases, engine oil pans, manual transmission and differential drain and fill plugs
• For use with 3/8 in. square drives tools
• For servicing plugs in Ford, Jeep, Volvo and more
• Forged from the finest chrome-molybdenum alloy steel, the best choice for strength

This is a Square Male Socket. It is 8 mm and 4-Point. It is 3/8 in. drive.