This is a versatile oil seal remover and installer tool designed for Cummins 3.9L, 5.9L, and 6.7L engines, specifically models 4BT, 3.9L, 6BT ISB QSB, and 6D107. It is an indispensable accessory for those engaged in heavy-duty equipment maintenance or engine repair. Crafted for precision and durability, this China-manufactured tool set ensures ease of use and effective seal replacement for your Cummins engine. Whether you're a professional mechanic or a DIY enthusiast, this oil seal tool set will help you get the job done efficiently and with minimal hassle.