The GW7900 Kreepy Krauly Sand Shark is the latest evolution in automatic pool cleaning technology. The Pentair Sand Shark scrubs your pool walls and floor, dislodging stubborn dirt particles with its rows of rubber scrubbers before it instantly vacuums away the debris and sends it to your pool's filtration system where it belongs. The Sand Shark cuts a 12 inch wide cleaning path and easily cleans gunite, fiberglass and vinyl surfaces in all types of in-ground pools. The exclusive SmartTrac programmed steering system maneuvers around tight corners, ladders and obstacles ensuring fast, thorough cleaning performance. It cleans faster than random-style cleaners reducing the possibility of missed spots