Sunex 26499 1/2-Inch Drive 17-Mm Hex Impact Socket
No doubt, Sunex tools offer one of the most complete and toughest Impact Socket lines around.  This 1/2 inch drive, impact socket set is designed to tackle the toughest jobs with solid durability and keeps them pounding job after job.  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.