Fitment: Rear crankshaft oil seal remover and installer tool fit for Cummins L10 L10G M11 and ISM engines Features: 1) Used with seal #4089542. Remove and install the rear crankshaft oil seal on L10, M11 engines with rear power take-off (Repto). Installing seal number 4089544 seal will need to use AM-491824. And installing seal number 4089542 seal and sleeve will need to use 3164302 or ST-221 2) This tool is designed to install and remove the crankshaft rear oil seal without damaging the seal and leakage .