The Model S Hand-held 1/2″ drill-powered machine can be used for cleaning small, inside lines 1 1/4″ – 2 1/2″ in diameter up to 35 Ft. Double insulated commercial grade 1/2″ heavy-duty drill for shock prevention. Lightweight stainless steel cable drum won’t rust, break or crack. Cast aluminum hand guard is designed for safety and ease-of-use. Cable available in 1/4″, 5/16″, and 3/8″ diameter. Expanded end or drop head cable in 15′, 25′, 35′ sections.