FEATURES:
The flange distributes the load over a greater area, enabling a more secure install.
Purple anodized 6061-T6 aluminum construction.
Threaded hex-shaped wheel nuts.With an internal o-ring to maintain position under the most sever conditions
These screw onto the wheel hubs, locking on the wheels.

Dimentions:
outside diameter: 24.5mm
inside diameter: 10.8mm
hex: 17mm wrench