The UNTHA is designed as an all purpose grinder/shredder for general particle reduction of almost any waste material (not to include rocks, cement, solid steel, etc.) The primary advantage of UNTHA is in the four shaft design that recycles materal into three cutting areas, grinding and regrinding until the particles are small enough to fall through the bottom outlet sizing screen for one pass grinding. Screen size openings from 15mm to 60mm are available to provide the particle size you need.