It's amazing how one tiny thing can make a huge difference in your driving experience. In this case a 4" convex mirror affixed to my peep mirror on the 34 Chevy. With the flat mirror in the position it was in, it reflected against the side window effectively canceling the reflection thus rendering it useless. With the convex mirror I can now see perfectly. No more wondering if there is a car in the other lane and having my daughter look out the back window to see if it's clear.