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. Solid stainless steel 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 the 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. 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.