Chunshop Mini Portable Knife Sharpener Outdoor Whetstone Grinder Pocket Sharpening Tool (Gray) High-grade diamond whetstone ensures effective sharpening results. Can be used to sharpen knives or hooks. Small in size, light in weight, convenient to carry,Ideal item for camping use. Insert the knife into the sharpening slot and pull it back with appropriate force for three to five times,Place the sharpener on the platform. One hand holds the sharpener and the other hand holds the knife. Size:15mm x 10mm x 1.5mm(approx),Color: Green/Gray