We are a welding and fabrication company and 90% of our work is outsourced. We have made and purchased several grasshoppers to ground when welding on a bevel. Some of them were magnetic and some weren't. The problem we had was that when the tube was shaken to adjust the top/bottom position or adjust the gap, the bottom fell off when you were ready to attach it. up so you can get around the cage clamps and then they fall down. We resorted to bungee cord, which was fine until you actually started laying the pipe on the floor. It took about 30 seconds to tie the bungee, which isn't that long. However, if you're making 30 joints a day, it adds up. Strong soil (grasshopper) is light, not extra heavy. We made a whip with one tip to connect to the grasshopper and an LC40 on the other side to connect to our ground wire. Align the connection point, press in and plug in. Roll it out until about 10-11 and start welding. Switch sides, roll to the 1-2 o'clock side. Fast and easy, fast is the keyword. When you're done, take it off the pipe, attach it to the side of your rig and roll to the next. We bought two different versions and they cost around $60. The magnets hold very well. We used it on a 4" pipe and it's holding up great! Powercrete is fine, but this material causes problems with many magnetic tools. The nozzles of the ones we bought are also interchangeable. Very happy with these Grasshoppers from Stronghand!