TURBO Heat Welding Tools says that their Master TURBO Groover is THE ONLY GROOVER IN THE WORLD that can groove all the way to the wall, groove circles and curves, and comes in four different blade sizes. This Groover has been awarded 20 patents around the world. To see our FREE DVD of this tool in action, visit the web site below or call 714-522-4290.Circle 358 on the Reader Reader Inquiry Card.