There is as much difference between a real, heavy duty "tooth bar" and piranha as there is between the piranha and the bare bucket edge. The tooth bar allows you to dig much faster and into much harder ground. I take mine off when I need to level or back drag a smooth surface. If you do much dirt work you won't regret it. If you don't, you might just want to save your money. I have done a lot of digging big holes and grading and moving dirt without one...but it was a lot slower and used more fuel and still could not get as deep or move as much.