XH Outdoor Camping Knife Sharpener Double Sided Folded Pocket Sharpener Diamond Knife Sharpening Stone Folded Pocket Knife Sharpener, less risk of damaging the edges. The coarse surface much more efficiency than waterstones. Light weight and compact storage, easy to carry and convenient to use. Widely apply to outdoor kife tool, scissor, gardening tool, etc. Double Side: Grit Coarse(360-400#) & Fine(600#)