The water-driven cutting ball nozzle from Enz USA moves easily around curves in 4- to 6-inch polyethylene, steel or concrete pipes. It can safely remove roots and mineral deposits without damaging the pipe. It works without impact but has the ability to switch to a vibrating nozzle. It is equipped with a hard metal front blade for pipes that are more than 50 percent clogged. The side blades are self-sharpening and maintain their sharpness over their entire service life. The cutting ball operates with controlled rotation speed and is capable of running on recycled water. It is leakage free. 877/369-8721; www.enzusainc.com.