Joseph Joseph 10145 Slice & Sharpen Paring Knife with Sharpening Protective Sheath, 3.5", Black All-in-one knife and sharpener set - Conveniently sharpen knives just before use Integrated high-quality ceramic sharpener in knife sheath, suitable for most types of stainless-steel blade. Not suitable for serrated or ceramic blades Non-slip base on the sheath for safe sharpening The knives are made of high-quality stainless-steel and have non-stick, silicone-coated blades and comfortable, ergonomic handles Sheath helps to protect knife when being stored