This is a very nice embroidery frame that is held rigidly together with connectors in the corners. Once assembled it has tremendous strength. The embroidery is sewn onto the frame like our slate frames. All of the Rigid frames are measured for the working area. For example if you ordered a 12 inch frame the working area would be 12 inches square and the overall size would be 16 inches. All frames include the hardware and wrenches needed to set it up. These are great frames if you need stability more than flexibility. They are especially useful for styles of embroidery such as nanduti embroidery.