Peter sharpen small but perfect for giving new life to my dear knives. Amateur pocket knives, some were poor for a long time, and the gun was useless. Ten minutes a knife with stones and that is another story ... After allowing the stone to soak in water overnight, a few slow movements and firm at 20 degrees on a stone water constantly watered and wire immediately becomes very sharp ... Note, a coarse side for roughing work and a fine side for sharpening accurately. To order without moderation!