Anyone who works with photo-etch (PE) on their models knows how frustrating it can be to turn flat sheets of brass into boxes and complex shapes. This tool has several differently-sized edges for bending corners into your PE parts. The red knob tightens the straight edge down; it unfortunately doesn't get tight enough to hold some of the Eduard 1/72 scale pieces I've been using, without having to manually hold the edge down with my finger. The tool still does make things much easier, though. My main complaint is the price; it's two pieces of plastic, a small screw, and four rubber feet for nearly $20.