See: 1up Racing

California based 1up Racing have added new lockdown M4 wheel nuts to their range. The lockdown M4 wheel nuts feature an oversize outer diameter and narrow inner diameter to give our low-profile serrations up to 200% more surface area to grip the wheel. It’s easy to see the difference compared to commonly used wheel nuts which dig into and damage the wheel, resulting in excess flex. Dark black anodizing and a bright silver outer chamfer instantly improve the aesthetics of any car lucky enough to be rocking a set of these.