Redi-Edge Dog Tag Sharpener Black Small 40 Degree. Features military-grade aluminum construction for extreme durability long life and lightweight. Design features include a proprietary corrosion-resistant finish and a honing surface on the back. The Duromite sharpening elements are harder than any knife blade; and factory pre-set to sharpen most knife blades. Specifications for Redi-Edge Dog Tag Sharpener: Manufacturer: Redi-Edge Color: Black Package Contents: Redi-Edge Dog Tag Sharpener Redi-Edge REDTS-40: Dog Tag Sharpener Black Small 40 Degree