2000 Pontiac Sunfire Rear brakes are making loud grinding n

Hi, whenever I apply the breaks the rear ones are making a very loud grinding noise. What parts will I need to replace, how do I replace them and what tools will I need for the job?

I've replaced front brake pads on vehicles many times but I have never had to deal with rear breaks. Is it as simple as replacing front break pads or is there more involved?

Thanks!