I have the same ones as Tim. Vibration was a problem so after I got them set in the correct position, dabbed some silicone at 5 or 6 locations around the edge of the mirrors to hold the settings in place. Then I marked left and right on the inside of the housings to be able to get back on the same way. I don't tow all the time so these work OK for me. If I towed all the time, would want something better.