Ferroform Super 7 was tested at PT.ECA Indonesia on bolts from a rock drill machine that were very difficult to open. After spraying the bolts 2-3 times with Ferroform Super 7 for 2 seconds each spray, the bolts easily opened with a bolt key. According to PT.ECA Indonesia mechanics, other rust removal products are not as effective, can damage bolts, or produce bad smells, whereas Ferroform Super 7 made opening the bolts easy without any issues.