Also known as a drain auger, a drain snake is a coiled device around ¼-inch thick. To use a drain snake, put the end into the entrance of the drain. Turn the handle to force the snake deeper, using extra pressure to force it through the bend in the pipe. Keep turning until the snake hits the clog, then either pull the snake and remove the obstruction or force it through. Once the snake is out of the drain, run the water on full blast for a few minutes to ensure the obstruction is completely removed.
There’s often an Allen wrench that comes with the garbage disposal. I keep it under the sink. When the thing jams, follow the directions in the manual, and I won’t need to come out. Another plumbing tip, don’t believe the myth about putting lemon peels in the disposal to make it smell better. That will just make it jam faster. These are the things you should never pour down the drain.