Fastest and easiest way to sharpen any knife. Patented spring action bars invented in Austria by a master knife maker make sharpening foolproof. Precision ground tungsten-carbide safely sharpens all types of knives including serrated and high-quality Damascus knives. Rugged PA 66 Nylon base. The precision tungsten-carbide sharpeners made in Austria auto-adjust to the angle of the knife blade. Control the angle from 12 degrees for a super-sharp fillet knife to 20 degrees for a rugged chopping blade. Sharpen, re-align, or polish knives just by changing angle of the blade. Professionals use a chef’s steel to realign and maintain a sharp cutting edge, but this skill takes much practice. Get the same results even faster with this triple-action sharpener. The tungsten-carbide presses the knife edge into alignment at the correct angle. Works equally on straight and serrated blades to maintain sharpness. Safe to use with the finest knives. Re-align edges before they roll over and dull. Polish a micro-bevel on the finest cutlery without fear of damaging blades. These two steps will keep knives razor sharp without removing any metal. Great for Japanese or Damascus knives, or any knife at all. Directions printed on bottom. Products with a Purpose | With a portion of our sales, we are proud to support the World Central Kitchen non-profit: founded in 2010 by Chef José Andrés, World Central Kitchen uses the power of food to nourish communities and strengthen economies in times of crisis and beyond.