FEATURES: 【Application】Perfectly compatible with 1989-2016 Cummins 4BT 3.9L, B Series 5.9L, for ISB 5.9L 6.7L and for QSB 5.9L 6.7L diesel engines, also fits for Paccar PX-6 engines. 【High Performance】Helps easily and properly remove and install the rear crankshaft seal / wear sleeve without damage and leakage, ensures that the installation depth of the crankshaft oil seal is correct. 【ST-213 - 3824498 1338 & ST-191B - 3824500 5046】For Cummins 3.9L, 5.9L, & 6.7L Front Cover Crankshaft Seal Installer Tool. Made to properly place the crankshaft seal without leaks. Help to properly press the wear seal into place evenly. .