Features and Benefits:

• 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
• Design also avoids rounding of rusted or damaged fasteners
• Socket is black oxide finish and has etchings for identification

This is a hex impact socket and is 21 mm. It is 1/2 in. drive. This socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job.