For a compact sharpener, look no further. The Chef Craft Roller Style Knife Sharpener is easy to use and gives a nice edge to any knife. To use, place roller on flat surface, bring knife edge to the side of the grindstone, and saw back and forth with consistent downwards pressure. To sharpen other side of blade, simply place knife into the other side of the sharpener. For best results, sharpen the knife on each side for 10-15 strokes.