ASTRO Knife Sharpener Mini-tactical Pro Sharp Easy Non Slip (2StepEDC) Fast and sharpens and polishes the edge, diamond tapered rod-for fast reconditioning and maintenance. Lightweight, portable, comes with a lanyard hole, and has non-slip rubber feet for added safety. Tungsten carbide-three or four strokes will restore your blade. Preset sharpening provide guaranteed results, crossed carbide blades provide quick edge setting. Easy to use small enough to sit unnoticed on a keychain.