Mushroom Knife w/Brush, Stainless Steel A versatile mushroom knife that folds for easy storage. Includes a curved blade that makes cutting mushrooms a breeze and a brush that can be used for cleaning the tops of mushrooms.. This traditional foldable mushroom knife is designed to separate the mushroom cap from the stem, thus stopping the mycelium (network of small filaments in the soil)the ridged backed can be used to remove the outer layer of the mushroom and can be cleaned on the spot with the brush. the wooden handle has a ruler allowing you to measure the size of the picked mushrooms. Blister card met euro lock.