Draft is the angle at which all vertical surfaces of a sand casting must slope down to the horizontal surfaces.
Draft allows the pattern to be removed from the sand mold without disturbing the sand.
It is important to note that too little draft can lead to excess roughness on that vertical surface. It is sometimes possible to cast a thinner wall just as it is sometimes essential to cast a wall thicker in certain situations. Because much of our production is decorative in all the metals we pour, we have become expert at producing sand castings with good to excellent surface quality.