Sharpal Blade Sharpening Cards
These credit-card-size sharpening stones from Sharpal make it easy to sharpen tools on the go. The nickel-plated steel cards have a diamond abrasive surface that can put a fresh edge on knives, axes, and other bladed tools. A pop-out handle provides grip and keeps fingers out of the way. Sold individually or in a set of coarse, fine, and extra-fine grit.