I heard a noise while driving today and found out that a metal piece coming out of the brake was hitting my wheel. Here is a picture of the metal piece coming out slowly below. I slowly hit it with a hammer to have it flush like on the other front side and coming back from work it came out again a little just not as much. So obviously it won't stay in place...What is this piece for? Im guessing I need to take it in to have the brake removed and checked?