The fuser blade features a rougher diamond coating than the starndard diamond black blade and the stainless blade. The fuser blade is better suited to cut through thicker denser pieces of rock. If you are doing major cutting on zoanthid/paly rocks or need to cut through larger rocks on a regular basis then this blade is a good choice. If you are cutting thinner rocks and corals then the stainless or diamond black blade is the best choice.