Sunex 330uz 3/8-Inch Drive 15/16-Inch 12-Point Universal Impact Socket 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 3/8-Inch drive 15/16-Inch, 12 point universal impact socket