This style of chew is cut from the base of an Axis antler. The base is the part of the antler that attaches to the head of the deer, and provides the foundation for the antler growth. Axis is the most dense antler that we sell because it contains no marrow in the center. Since the antler is so dense, it will last your dog for months! If your dog loves to chew, and can chew through anything, we recommend that you give this antler a try.