Features Fitment: This 19mm Fuel Line Socket Tool Alt perfectly works on Detroit Diesel DD13, DD15 and DD16 Alternative To: Alternative to W47058090900, supersedes J-48770. Material: Constructed from high quality with Carbon steel black powder coated, this tool ensures excellent mechanical and physical properties, durable in use and great in resisting rust and corrosion. Benefits: Allows you to grip tightly during removal and ensures you never lose torque. Originally designed for fuel lines, but they can be used wherever you have a hard to reach area. .