Features and Benefits:

• Designed to tackle the toughest jobs with solid durability and keeps them pounding job after job
• Forged from the finest chrome-molybdenum alloy steel, the best choice for strength
• Radius corner design extends the life of fasteners; design drives the side of the fastener instead of the corner
• Black oxide finish and has etchings for identification

This is an impact Socket and it is 1/2 in. It is 1/2 in. drive and 12 points. 12-point design means less wear on the fasteners.