Boss II sluice is designed for HEAVY Production, delivering excellent fine gold recovery as well as high production rates. This innovative sluice is widely known for its unmatched ability to capture hard-to-find fine gold thanks to a unique dual-flair design. Constrictions near the ramp slow water flow, then widen out to cause a quick, drastic drop in water pressure. This allows heavier precious metals to fall into the riffles and get captured where it can be recovered easily. Two-step ramp riffles capture more fine gold. Struts across the sluice serve as a bridge for rock weights. Handy carrying handles.