Features and Benefits:This special 3/8" drive barring tool is used when making valve adjustments or pump settings and is made with a two piece sleeve; The two piece sleeve allows proper contact with the flysheel when the flywheel is at different depths from the hole where the tool is insterted; Fo use on 1987 and newer Cummins B and C series engines and J.I. Case 3.9L, 5.9L and 8.3L disel engines; Most if the popular Dodge diesel pickup trucks require the use of this tool