Closet augers are for use on toilets. Closet augers require a shorter length of snake than most other augers, because they generally only need to travel the length of the toilet fixture itself. They also have a rigid tube along half the length, with a curved end, which sits in the toilet bowl.
The component which differentiates a closet/toilet auger from other types is the long, rigid tube with a curved end. This allows the tool to manoeuvre the toilet bowl easily.
Closet augers come in two lengths: 3 ft and 6 ft. The 6ft version is slightly different because the extra length is housed within the tubing. To release it, there is a button located between the handles. This allows an inner tube to be pulled up and then wound down to release the extra cable.
Toilet augers are slightly larger in diameter than most other drain snakes, measuring in at 3/8″ (9.5 mm) compared to the usual 1/4″ (6 mm). This is because the drains are wider in toilet systems and the smaller snakes may become tangled.