The Patent Pending CrazyCrusher is not just a crusher to crush ore samples with! Although that is the original design, with minor adjustments it can also be used for the hobbyist to crush rocks to a size suitable for tumbling and polishing. It can also be used to crush CPU chips to recycle the gold. In addition to that, it works great to crush glass to a powder for smelting operations, easily and safely, as well, your black sand concentrates for further extraction of fine gold. During the Holidays, it will wreak havoc on bags full of walnuts!