Ultimate Screening Flexibility. The Backers three-fraction MA (wheeled) star screen transforms a single material stream into three finished products. By initially passing all material over the course deck, even wet or sticky organics are loosened increasing the overall screening efficiency and produce a more consistent medium and fines product. Add the optional Grizzly, and a fourth very course fraction can be produced; or attach an optional Wind Sifter to remove contaminants from both screening decks. For ultimate flexibility and throughput Backers three-fraction star screens are unparalleled.