Works very well. I ordered them last fall and used them to assemble and glue together some jewelry boxes and tray inserts I made for Christmas gifts. It is very convenient if the clamping surface is square. There is a notch on the outside of the box to squeeze out the glue so you don't have to worry about sticking to the squares (which can be a problem when using epoxy for example). You can also pinch the inside of the assembly, although there is no extrusion cutout on that side. They are almost identical to the Woodpecker Clamp Squares but slightly smaller. Their small size suits my needs better than the larger ones as I mainly work on small projects.