The Redi-Edge Dog Tag Knife Sharpener’s dog tag design ensures that it is conveniently portable. Constructed of military-grade aluminum, it is smaller than the size of a dog tag. It also features Duromite sharpening elements harder than any knife blade set at a 40 degree inclusive angle to give your knives a consistent 20 degree double edge. The Dog Tag Knife Sharpener is equipped with a Ceramitized corrosion-resistant finish that will protect it in harsh environments. It also features a honing surface on the back so you can hone and polish your knives. A lanyard hole allows you to attach the sharpener to a rope, clip, or keychain. The Dog Tag Knife Sharpener is compact and lightweight so you can take it with you to put a reliable edge on your knives.