You should be able to adjust it and when adjusted tighten the two little screws to hold it firm. However, because the mirror sits out over the fender, it is susceptible to being banged around as you or someone else (ie. car shows, etc.) walks near the car. If tightened too much, it could be broken if hit. To prevent this, I rotate the mirror inwards, so they do not hang out over the fenders. While the fender mirrors look great and are useful to view traffic on either side, I depend more on the rear view mirror. Hope this helps.