This is a Rear Parking Emergency Brake Shoe Set with Springs. It is made to fit the following vehicles, years and models: 

Fits:

Ford
Explorer 2002-2010
Explorer Sport 2003-2003
Explorer Sport Trac 2007-2010

Lincoln
Aviator 2003-2005

Mercury
Mountaineer 2002-2010

Includes:

1x Part# 1404-10749 B791 NB791 Rear Parking Emergency Brake Shoe Set; Both Sides (Fits Inside Rear Rotors)
1x Part# 7315 Rear Parking Emergency Brake Shoe Spring Set; Both Sides