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 * Fully guaranteed No doubt, Sunex tools offer one of the most complete and toughest Impact Socket lines around. This 3/8" drive 13mm standard 6 point socket is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job. Also it features a radius corner design, causing the socket to grab the sturdy wall of the fastener instead of grabbing the corners, resulting in less wear on the fastener.