Plumbers Snake tool, a coiled spiral snake that’s usually about 1/4-inch thick with a handle on one end, works the opposite way that a plunger does: You push the snake farther into the obstruction. While parts of the clog break up and flush through the drain, the snake helps you gain access to the clog so that you can pull it out. Some snakes can fit as an attachment on an electric drill, giving it more power to force it through the clog. Plumbers Snake are especially handy because they’re long enough to reach clogs that are deep within a drainpipe. You keep pushing the snake in and all it does is coil up behind the clog; nothing happens.
If neither cleaning the trap nor plunging clears a plumbing clog, your final weapon is a drain auger (also known as a snake).