You make this practical toolbox out of two small and one big box held together by 8 arms. You attach the arms to the boxes with standard screws for wood.
When you swing the handles outwards the small boxes moves sideways so you can get to the box beneth them.
Follow the measurments on the drawing to make sure the arms run smouthly.
From the Norwegian weekly magazine
"Norsk Ukeblad" – January 16th. 1954