Durable monocrystalline diamonds coated full tang stainless steel. The diamond coating of this product has a very high hardness. It can sharpen all your tools like new ones. Coarse 325 grit (45 micron) for quick edge setting; Extra fine 1200 grit (12 micron) for honing. 2 sharpening surfaces to meet your different sharpening needs No oil is needed-sharpen dry. Simplify the sharpening process without the need for preparation or troublesome cleaning up. The ergonomically designed grip, along with 20° angle guides on both sides, makes your use more effortless and comfortable 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. SHARPAL 121N Dual-Grit Diamond Sharpener is excellent for sharpening even the hardest steel blades and works best on hunting knives, tactical knives, everyday pocket knives and tools edge. Industrial monocrystalline diamond is electroplated in nickel onto a stainless steel base. With industrial precision flat, hard wearing surface and durable design, it guarantees consistent, even sharpening for years of dependable use. It is double-sided with both coarse and extra fine diamond surfaces. Use the coarse side 325 grit (45 micron) to quickly and easily restore a dull or damaged edge. Use the extra fine side 1200 grit (9 micron) to hone. Sharpen dry. No messy oil needed.