King Headz 17mm Fine Thread Closed End Wheel Nut (Black) (4)

So far I've had great luck with these. They don't have the rough serrated inside edge but a slight dimple, like other people said. It doesn't feel like it would do much for bite, but in my case they haven't come loose on me so they must be working. I've run these on 4s truggy and MT, however I do have punch control high to be easy on the drivetrain, so I haven't given them a serious stop-go thrashing test, and don't intend to.
Another thing to note is that these seem to be slightly deeper than the others like the Tekno and JC's - if you have longer threaded hubs (RC8T hubs for example) these will fit fine on a standard thickness wheel like a proline or AKA. I read that the other brands mentioned will bottom out on the hub before it tightens down on the wheel. The RC8T hubs are 1mm longer than my MTs.
Not to mention these cost a lot less than the other brands, so it's a win/win for me.

Great product, really nice finish ! They never comes loose and stop the dirt to come inside the axle of the wheel... I will recommend it for sure !