How to fix a clamp connection at 45 degrees in a simple manner

Found Internet simple device which allows to fix parts cut at 45 degrees just one clamp. It decided to manufacture and test, and that's what came out of it.

making

For its implementation requires a rectangular plate or block of suitable thickness. The crown center cut holes and square is 90 degrees markingThen all neatly sawed. Obtain two parts, which will fix the workpiece to a predetermined degree.

inspection

As you can see from the photo, fixation occurs due to fastening two parts one clamp, and they, in turn, hold the workpiece to the desired angle.

Now you can collect the boxes and frames using the minimum number of fasteners. Samu made a check on the already connected in the corners, in practice is not yet applied, but the idea seemed to me very interesting.

What do you think about it, I had to deal with this problem and how to choose?

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