I've recently used this to put together some really expensive decorative frames for some of my paintings. It was a lifesaver and very easy to use. All frames turned out great. Just a tip - I put some masking tape on the surface of the red pieces in each corner to give my frames some padding. When I first used it I didn't realize how much force this thing could exert and I ended up with very small dents on the edges of my frame. But my fault, not the machines.