... supper sharp and longer life than the traditional steel knife,with no need of sharpening for years Stain and ... cutting hard ,frozen or broned food.Please use with a plastic or wooden cutting board ,Avoid cutting on marble ,stone ... solutionPlease put it on the knife set or plastic scabbard after you finished using the knife,keep it away from the ... <0.6Thermal conductivityW/(m.k)2.5 Folding Utility Knife