The Mac Professional Series Slicer is ideal for a variety of tasks, including filleting large fish such as salmon, tuna and halibut. The blade is crafted from high-carbon chrome Molybdenum steel with vanadium, which helps the blade resist rust, and is 59-61 Rockwell hardness. The handle is constructed from resin Pakkawood with a bolster for added weight and balance. And the 2.5mm thick heel provides extra support to prevent slipping while you work. An additional 25-year warranty provides peace of mind that your purchase will last a lifetime.