This is a high-quality Barring Drive Gear that is compatible with Cummins Engine models KTA19, KTA38, KTA50, and NT855. It is manufactured in China and is designed to provide reliable performance and durability. The unit is sold individually and is a perfect fit for your commercial truck's engine. The gear is made of high-quality materials, ensuring longevity and endurance. It is easy to install and operate, making it a great addition to your truck's engine components. This Barring Drive Gear is a must-have for anyone looking to upgrade their engine's performance and efficiency.