The basic drain auger (coil and auger head) is the main working part of every type of drain snake.
Power drum auger drum
Power drum augers are very similar to drum augers. Like drum augers, they house the snake within a drum to keep it neat and untangled. The handhold and locking mechanisms also work in the same way.
Power drum auger drill
The feature that distinguishes a power drum auger is the built-in power drill which means that no manual turning is ever necessary. However, those without an automatic feeding feature will still require the snake to be dispensed by hand.
Alternative designs of power drum augers
Powered augers can also come with a stand. These augers work in the same way, but can sit flat or elevated and only require steadying.