I finally yielded to the temptation to offer me this box, and I'm not disappointed, after some tests on different pieces of wood to "assess" the quality of the tool, I'm surprised the assembly power even with a simple 4 mm screw diameter !!! The kit contains enough to make some connections time to become familiar with the tool and buy screws, it is very easy to use (to compare with the cabinet Dowel of the same brand I have, "very many Besides "), knowing that we can associate the two in some assemblies, for info I'm an amateur in woodworking but I can only praise the qualities of the tool.