Much smaller than I expected but suitable for projects with 1x1 and maybe even 2x1 boards. While the design and build are quite functional, the overall quality of the parts feels a bit cheap. But since the overall price isn't very expensive, you really do get what you pay for. They come in handy in my small projects, but you definitely can't use them in something like 2 x 4's or more. All in all I would return them but I decided to keep them as I'm sure I will need them at some point and as I thought I did. Good for small projects, useless for big ones.