The XDP WIF wrench XD128 is a must have for any GM Duramax owner, it makes removing and replacing your factory water in fuel sensor a breeze. The XDP WIF Wrench is specifically designed for the 12 sided plastic water sensor that is easily damaged by tools, like pliers, that do not specifically fit the sensor. As an added bonus the opposite side of the wrench is slotted to remove the plastic air bleeder screw with ease, preventing possibly rounding off the screw head. Features: Precision machined 12 sided wrench perfectly fits stock water in fuel sensorHigh Quality T-6061 Aluminum Black Anodized Finish with engraved XDP logoBleeder screw driver on the opposite end