Combination stone contains:
Soft Arkansas (Medium): This is the coarsest, most versatile and most popular of the Arkansas stones. Soft Arkansas stones are used to quickly put an initial edge on dull or neglected knives or other cutting tools. This is a natural stone and color can vary from white to gray/black to pink/gray, or a combination of these colors in a single stone.
Surgical Black (Extra FIne : This is the hardest of the Arkansas stones and was traditionally used to sharpen dental tools and scalpels, hence the name "Surgical." The Black Arkansas will hone a polished, very sharp razor sharp edge on knives and tools.Color can vary from dark grey, to blue/black to black.
Comes in hardwood box to protect when not in use.