First I must say that I am not working in carpentry, I wanted to assemble angle wood pieces to redo a small speaker. First I cut tab, to have a good finish. For assembly and gluing it becomes it's a bit difficult without his tools. I bought 4 .Parfait to 1 frame, for example. Placed 1 "corner clamps at each corner. No more breaking the head with a square. The elements are angled in a KEPT SIMPLE operation. The result is very satisfactory. I do not regret my purchase. I should take my box to 8 in one operation. Perfect for boards of up to 25 / 30mm thick. Beyond ca lot of the skills of the tool.