Sectional drain cleaners are lighter and more powerful than drum-type drain cleaners. Cables come in short 7-1/2, 8, 10, or 15 foot sections, rather than one continuous length. Instead of carrying the weight of a full length cable in the machine, you just carry the as much cable as you need to do the job. Small machines use 5/8" or 7/8" sections to clear 2" to 4" lines up to 150 ft long. Large machines use 1-1/4" sections to handle jobs up to 200 ft. long in lines from 3" to 10" diameter.