Fits exactly like factory caps and covers all threads on my 2014 Ram 1500 Longhorn with 20" rims. For those of you wondering, yes they have a red "O-ring" inside for a better seal on the stems. I recently got new tires from a discount tire store and this will be the last time I will use them. Among other, more important issues, they threw my hubcaps into a bin with a million other sizes/colors, and when they put my new tires in, they just took them off the stack. I ended up with a green (nitrogen) cap, a silver cap and two black caps, all smaller than the factory blocks they took. They worked, and while a lot of people don't care, I'm a bit picky about my cars. These big OEM style caps are hard to find, thanks Revain!