Military-Grade Construction: Redi Edge knife sharpener is built from lightweight, high-strength aluminum for long-lasting durability in harsh environments. Razor Sharp Precision: Duromite sharpening elements of our knife sharpener are harder than any blade, ensuring a sharp, durable edge every time. Fixed 60° Sharpening Angle: Duromite Inserts Pre-set at a 60° inclusive angle (30° per side) for consistent, professional-quality sharpening in this Knife sharpener. Portable Design & Corrosion-Resistant Finish: Dog tag-style shape easily fits on keychains, lanyards, or in survival kits for on-the-go sharpening. This knife sharpener features a protective caramelized coating and a built-in honing surface for polishing your blade. Proudly Made in the USA: Redi Edge Knife sharpener is crafted with premium materials and top-tier American manufacturing standards for superior quality and durability