Bests & Worsts Reviews from Amazon

I bought two pairs of these for the license plate frame on my motorcycle. I can't believe they are already rusty. After less than two months, they are rusting on all sides. I can't return them for a refund because Amazon's return window closed two weeks ago. UPDATE 2/19/2016: I just replaced these with new bolts, and I'm adding a picture so everyone can see how rusty they got. These are obviously NOT made of stainless steel.