We have ordered these pliers in order to turn the gas pipes in 8 and 10 mm, in the hope that you can not go wrong with Gedore. However, this was thought wrong. The 8 mm tubes no longer could be even more so just bend with lots of hand strength, the 10 mm pipes. So came a little physical exertion added, with the result that the pliers and not the pipe has buckled. Pliers was then scrap. So be careful: if you want turn 10mm steel tubes, stay away