Yes - a good piece does not work only with Styrofoam, but also with foam (cut for a camera case inlay). So far so good. It works. And now comes the big BUT: The upper screw to hold the wire is designed "to save material", that it has just not reached for three / four mounting attempts. I have returned the trimmer with the power supply unit. Thanks Amazon no problem. But since I do every now and then re-arrange my equipment bags and new display fittings and thus the foam inlays must be replaced from time to time, I'm going to maybe buy a desktop unit by Proxxon. Thus, there is then also right-angled cuts.