Re: Pulsating brakes at low speed
That is what holds the auto adjuster onto the starwheel (keeps shoes at right spaceing to the drum) I had this problem and have fixed for many people at work and friends/family. I would recommend you replace the springs/drums/shoes and you should see a huge improvement. I did this to my truck a few weeks after I bought it, fixed it instantly.
I only say replace it all because the shoes will have worn a tiny bit to the rotor regardless of how it looks visually.
2002 Edge, 4x4, LSD/4.10's, 4.0 SOHC, Auto., 32x11.5x15 BFG A/T, One piece HID Projectors, LED Tails/ 3rd BL, Cherry Bomb Glasspack Exhaust