i put this magnet on a buddies truck and he drove around with it for about 4 days.
He took it off and about a week later, i put this one on it. It didn't last but a day in a half or so.
About a month later, i put this one on and it lasted for 3 days until his neighbor asked him to take it off of his truck. hahaha
No, that's not me in the pics.