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
• The 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 21mm. It is 3/4" drive and 6 point.