These super sharp VG-10 Japanese stainless steel knives are clad with 2 layers of low carbon steel on each side. This design could increase toughness, improve stain resistance, and prolong knife life. The prefect weight balanced full length handle are made of TPR which is durable, non-slip, easy to clean, waterproof, bacteria-resist, comfortable, and beautiful. Mirror polished stainless steel bolster and butt end design make these knives even better. Every Zhen Premium knife comes with its own hand crafted gift box or storage box. DON'T chop bone or use knife on hard surface like glass cutting board, tile, and granite. Hand-wash your blades with gentle dish soap, rinse clean and towel dry immediately to prevent rust (no dish washer). Hone your blades with a steel or ceramic rod weekly to keep it sharp. Recommend to sharpen your blades with a whetstone at an angle of 15 - 20 degrees. 100% satisfaction guarantee.