From 1up Racing:
Introducing the new 1up Racing Lockdown M4 Wheel Nuts! Our low-profile serrations feature an oversize outer diameter and narrow inner diameter offering up to 200% more surface area to put your wheels on lockdown! It’s easy to see the difference compared to commonly used wheel nuts which dig into and damage the wheel surface, 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! Don’t hesitate any longer, 1up your race fleet with the new 1up Racing Lockdown M4 Wheel Nuts today!