The ClogChopper cutting tool from General Pipe Cleaners has six self-sharpening blades that dig into encrusted debris and root masses, grinding up stoppages, scale and crystallized urine without risking pipe damage. The spherical design maneuvers around tight bends and traps, thoroughly and safely cleaning metal, plastic and clay pipes. They are available in 1-, 1 1/2-, 2-, 2 1/2-, 3- and 4-inch sizes, and can be adapted to most brands of drain cleaning machines. They can be used for clearing stacks, downspouts and mains, as well as for drain lining jobs. The balanced unit automatically negotiates multiple tricky bends, maintaining a central line position and minimizing pipe wall, elbow, connection and joint damage. With all-surface cutting edges, it clears clogs and scrapes encrusted debris from inner walls all in one operation. The six inverted cutting edges run smoothly without rattling or jumping. Connectors are available for most popular brands of drain cleaning machines. 800/245-6200; www.drainbrain.com.