Stanley Proto J49000CFFN 3/8-Inch Drive Crowfoot Flare Nut Wrench, Set, 8-Piece Crowfoot wrenches are used in hard to reach, restricted access situations where a standard wrench or ratchet cannot reach Broad size range ensures the right tool for the application will be available Typically used in lower torque applications Full polish finish provides corrosion resistance and easy to clean surfaces 12 point flare nut end allows for fine indexing, helping to improve speed and access. Fits 4, 6 and 12 point fasteners