Use the Haiku whetstone for best results; if necessary another ceramic whetstone may be used. In a desperate situation draw the knife's edge over the bottom of an unglazed porcelain bowl to sharpen. Please never use a sharpening-steel as it will damage the fine Haiku edge. Color: Metallic. Utility Knife. Extremely sharp stainless steel blade. Honoki Wood handle. Please take special care when using them (Keep away from children). Never wash Haiku knives in the dishwasher the aggressive detergents and heat damage the steel and the honoki wood. Always wash the knife in warm water and dry it by hand after every use. Such care insures life-long reliability of Haiku. Do not cut bone or another hard materials with Haiku knives. A cleaver should be used for such tasks. A Haiku knife needs to be sharpened at home to stay sharp a long time. 32 layers Damascus steel with hard carbon center. Blade manufactured by Sumikama cutlery Seki Japan. Pin added to handle for stability. Dimensions: 1"L x 11.5"H x 3.5"W.