That looks like the clips that hold the pivot pins on a Huck brake system. Push on the fat side of the clip so that the skinny side moves out away from the pin. Use a flat head screwdriver to bend up the skinny part of the ring (the clip). With the skinny part bent up, you can easily push the clip off the pin.

Hope that makes sense!


1953 3600 Pickup
1946 Fleetline Aerosedan
1948 Hudson Commodore