The body of an adjustable pipe cutter is shaped so that a pipe can lie within it, against the blade.
Adjustable pipe cutter wheel
The wheel of the adjustable pipe cutter is protected by the shell casing.
Adjustable pipe cutter rollers
The rollers are two round wheels which the pipe rests upon. They spin around as the cutter is rotated so that the pipe is not caught up in the motion of the cutter and stays in the same position.
Adjustable pipe cutter handle
The handle on the adjustable pipe cutter is turned clockwise to move the cutting wheel to the desired position.