The Redi-Edge Multi Tool Sharpener sharpens both straight and serrated blades. The Multi Tool sharpens, straight, double-edged blades with its Duromite sharpening elements; these elements are factory set at a 40 degree inclusive angle to give your knives a consistent 20 degree double edge. The sharpener is also capable of sharpening serrated blades with the diamond coated honing rod that slides into the long of the sharpener when it's not in use. Crafted from military-grade aluminum to provide lightweight, long-lasting durability. Features a corrosion-resistant finish to protect the sharpener from harsh environments. This sharpener will keep your hunting, culinary, and work knives sharp and ready to use. The Multi Tool Sharpener comes with a ballistic black sheath and offers a sharpening surface for both straight and serrated knife blades to accommodate a range of sharpening needs.