Dorothy from kansas, it's not clear exactly what you're asking. Are you talking about the spring referenced in this picture?
[image|3116663]
This is from the front brake pad replacement guide on Step 25.
[guide|77670|1999-2004 Jeep Grand Cherokee WJ Brake Pad Replacement (1999, 2000, 2001, 2002, 2003, 2004) - iFixit Repair Guide|new_window=true]
If that's not what you're referring to, can you post a picture of the part you're concerned with?