This Neilsen 17mm Fuel Injection Line Socket is designed for screwed-in injection lines found on Diesel Common Rail Injection Systems. It features a 1/2" drive and is 120mm long. This open 12-point socket is suitable for Mercedes vehicles, including models 100, 130, 314, 360, 360H, 352A, 346/355, 401, 402, 403, 407H, 615, 616, and 617.