FAST, Durable and Heavy-Duty: Industrial monocrystalline diamonds are electroplated onto a stainless steel base of 0.33 inch thickness. Up to 5 times faster sharpening than oil stone, water stone | DUAL GRIT: Coarse 325 grit (45 micron) for quick edge setting; Extra fine 1200 grit (12 micron) for honing. Sharpen and Hone ALL HARD Material including High Speed Steel, Carbide, Ceramic & Cubic Boron Nitride. Sharpen dry. No messy oil or water needed. | Super FLAT Surface: SHARPAL exclusive MirrorFlat technology guarantees long-lasting even contact with knives or tools, while oil stone and water stone easily wear down with uneven surface | Superior Bonus Pack: Includes storage box with non-slip rubber pad that can be used as a stone base while sharpening; With Sharpening Angle Guide integrated with 4 universal angles-14°, 17°, 20°, 25° and instruction manual inside of packaging | 3 YEARS of Commitment and Superior After-Sale Service: SHARPAL, headquartered in California, USA, with branches in Germany and Australia, provides easy and effective sharpening solutions. All products undergo rigorous testing to ensure top-tier performance and durability.