Thanks for your great review on our spacers! Thanks for your business as well. In Most cases extended thread lug nuts are not even needed, we just offer them just in case a customer may have shorter studs or previously trimmed their stock studs. If you look at the mating surface of the actual conical seat, you will notice, our lug nuts make 90% of the same exact contact when applied meaning that these are 1000% safe. We've literally sold 1000's of these sets with ZERO issues. You can check this by simply rubbing the lugs on the wheel seats, and comparing the markings where the lug seat meets the wheel seat. Hope this helps. Thanks again for your business, God bless! Wheel Adapters USA customer support.