3-Stage Knife Sharpening System - The first diamond sharpening rod repairs and straightens damaged blades before the second slot sharpens to restore its V-shape. Finally, the third slot fine tunes for a clean polish. The 2-stage mini pocket sharpening stone is portable and can be easily carried when going out for camping or other outdoor activities. Multi-Purpose Knife Sharpener - Suitable for sharpening straight stainless steel knives, ideal for survival knives, hunting knives, multi-function knives, steak knives, filet knives, and pocket knives (not for scissors, ceramic, or serrated knives). Premium Quality - Constructed from solid plastic and premium 304 stainless steel, it is strong, durable, and designed to last. Made with high-quality materials to help keep knives performing like new. Safety Design - Features a non-slip base and removable grinder head to enhance safety during use and protect hands. Easy to Use - Suitable for both right and left-handed users. Simply place the blade in each slot and gently pull the knife through a few times for fast, effective sharpening.