Wrap the leather strap around a piece of antler. Allow both loose ends of the strap to extend 2 to 3 inches below the antler.
Place the ends of the leather strap in the jaws of a vise. Close the vise until the jaw opening is 1/4 inch smaller than the diameter of the antler. Push the antler toward the vise as you tighten the vise. Tighten the vise until the leather strap tightly holds the antler in place.
Place a pencil mark on top of the antler at the location of each cut.
Set the blade of a hacksaw on one of the pencil marks with the saw handle next to the antler. Pull the hacksaw toward you to start the cut. Push and pull the saw using minimal downward pressure until the blade cuts through the antler. Cut the antler at the second mark using the same method.
Remove the antler from the vise. Remove the leather strap from the antler.