The round spoke wrench has been composed of iron, due to which it is rigid and offers hardness. The spoke wrench has a high wear resistance ensuring a long life. Also, the rounded corners massively reduce the chances of the spokes cover getting damaged. While making changes to the spokes, the rounded corners won’t hurt your hands while working on resolving the tension in the spokes.
For the extra grip, the spokes have a deep cavity or a deep u channel. The 8 groove design is ideal for 9/10/11/12/13/14/14/15 gauge spokes. So, you get a variety of options for the same spoke wrench.