Hinged Success

I've tried to make some hinges before but with varying degrees of success. I needed something larger and load bearing to redo the Large Wooden Box. I came up with this little design. It builds upon the other hinges in that the overlapping circle is etched to allow each layer to move freely over each other. The bolt is hidden inside the hinge with some end caps and 2 of the inner layers are constructed in such a way that it prevents the hinge from opening beyond 120 degrees which means the lid can fall back and snap off. (svg here)