sliding tungsten-carbide sharpener

         The sliding tungsten-carbide sharpener has two angles. the wider angle is good for sharpering:scissors, shears, loppers, serrated knives, etc. the straight angle is good for: skis, snowboards and other items with a straight, non-beveled edge 
         The sliding sharpener blade is also reversable. loosen the larger blue dial so the sliding sharpener can be moved. push the sliding sharpener blade out as far as it can go. loosen the larger dial more until you can pull the sliding blade out all the way. simply flip it over and reassemble