The ring shank is the band part of a ring. Ring shanks come in many different styles such as cathedral, tapered, straight, split and European.
The European style shank is a great choice for comfort and wear-ability.
The European shank is a heavier flat shank across the back of the finger that typically does not spin as much as a traditional rounded shank. The European shank has more metal, which increases the price. European shanks have always been very popular and continues to be so.