This unit is sthe Sandvik QA 331 Tracked screen is a sturdy and durable unit that has been developed for use in the recycling and contracting industries. The unit features a two bearing screen box with a screening angle that can be adjusted. The bottom deck has a 6 degree screening angle that can accommodate optimal screening efficiency. When used in conjunction with the increased surface area and improved throw on the screen box, drastically increases screening efficiency and screening capacity via the screenbox. The expanded screening area, high frequency double deck screen, and six degree inclined angle on the screen box create a "banana" effect that increases the rate of production. The unit can be used in areas with limited space such as inner city projects, quarries, and recycling centers. The unit is structurally sound, and low maintenance. The fuel efficient unit offers reduced operating costs.