Razor Sharp with Durable Edges: Sharpness is the key word for chefs knives. The razor-sharp edge is engineered with a 57±1 hardness score and is hand polished by our experienced craftsmen at 15° per side. The combination of maximum sharpness and edge retention makes precise and effortless cutting every time, even left-handed. DO NOT test the sharpness by touching the blade with your hand.