These lighters are junk - and I say something really rare. They are relatively small and thus contain very little gas. The flame is unfortunately not very large, even if one takes the flame size to Max.. Sure, we could carry out such conversion, but honestly, I do not want to tamper with any lighter. However, these points would all be bearable, but unfortunately during my breaks pretty much any of these lighters in the shortest possible time the Zündmechanik from, or piezo dislike more, ... Thus, it is then ready for the dustbin. To refill it so almost never comes. Somehow a pity that nowadays barely gets reasonable lighters. 10 years ago, you still got another quality as those held lighters with me part 2 years or more through.