SHARPAL 101N 6-In-1 Knife Sharpener & Survival Tool features pre-set crossed carbides for quick edge setting and ceramic blades for fine honing. A fold out, tapered Medium 400 Grit diamond coated rod with grooves is designed to sharpen serrations, gut hooks & fishhooks. And built-in fire starter, high-pitched whistle are for outdoor emergency use. Useful for hunters, fishermen, campers, fire & rescue, cooks. Compact body with lanyard hole fits in your pocket, hunting pack, tool box.