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 1/2-Inch drive, 1-1/2-Inch extra deep impact socket, Weight: 1.13 pounds, Manufacturer: Sunex International