Antler carving is possible largely because of power tools which make use of burrs. Burrs are made from high speed steel, tungsten carbide or a diamond matrix. The cutting edges can be single or double fluted. They come in a variety of sizes and shapes and are used with a variety of flexible shaft or micro motor tools.
When you first start carving, you may purchase a Dremel kit from a local hardware store. This usually comes with the motor, flexible shaft and an assortment of burrs. Most of these burrs are useless for carving, so it will be necessary to purchase them separately.
I have included images of some of the most useful burrs for carving antler.