The infra-red weeder is the tool I tested but if it works the way you say it works my friend did not give me an adequate demonstration. We poked it into a weed and heard the hissing sound. Seconds later the weed looked the same. I asked my friend if it has already done everything its going to do and he said yes. If in fact the weed dies by starvation he would have been incorrect and i would have to have checked the weed the following days. Also, the tip of the tool is so hot that you see a red flame glow out of it at times. I asked if it could be a fire hazard and he said yes. I dismissed the usefulness of the tool at that point. In addition he said that he had tested it in the field with lackluster results but again, he may not have understood how it works. btw I have ordered a lot from Rittenhouse and they are very good. Got my Lesco spreader and Kelway tester and other stuff i cant get in my small city from them. Plz keep us posted as to the results you get from this innovative tool.