Features and Benefits:

• Forged from the finest chrome molybdenum alloy steel - the best choice for strength and durability
• Radius corner design - to extend the life of fasteners
• Design drives the side of the fastener instead of the corner
• Provides increased strength, but also avoids rounding of rusted or damaged fasteners

This is an Impact socket. It is 20 mm. It is 1/2 in. drive and 6 point.