I bought these nice little stem covers shortly after getting my new SUV. Now 7 months later I am sitting in the dealers waiting area to get my snow tires off (I thought!) and all-seasons on. I have just been informed that the stem covers have seized onto stem and service dept. is afraid it will break the valve stems. So NOW I will be driving back home in my studded winter tires because these things are stuck on! Not happy!You buy these things, they may be on to stay.I so regret this purchase!