These Leafware 7” (LWCRK) knives are made from 100% biodegradable birch wood. Birch wood, on top of being more environmentally friendly, is also sturdier that a traditional plastic utensils and can withstand temperatures up to 200 degrees Fahrenheit. Leafware knives feature a serrated cutting blade and contain no glues, glazes or dyes. All Leafware flatware is FDA approved for food use, is disposable and 100% compostable. Leafware birch wood knives are a unique piece of disposable cutlery that will leave the planet greener and your guests impressed.