What is the radio in? Dodge ram pick up or car? Typically all you have to do is take the the dash off, and you'll see two bolts holding the radio in. Take those bolts off, and they'll be a few...
You will need a DIN type stereo removal tool that is to be inserted on the front of the stereo in the four holes. basically they push back a metal clamp on the side of the radio that holds it firmly...