1. 【2-stage sharpening system】 Developed with a two-stage sharpening system, coarse sharpening for blunt knives, fine sharpening for polishing the blade. 2. 【Safe anti-skip base】 The non-slip, soft EVA base is located on the base of the knife sharpener, which keeps the sharpener in place when sharpening. 3. 【Easy to use】 Simply place the knife grinder blade in each of the slots and gently pull the knife through a few times for quick and effective sharpening. 4. 【Blade guide】 Straight edge blades: yes, jagged edge blades: yes, household scissors: no. 5. 【Compact for easy storage】 Tungsten carbide blades (coarse) offer quick edge adjustment, and the ceramic rods (fine) are used for the final edge honing.