I wanted a small portable and waterproof case for the Allen key I carry on my life jacket when I go out with my kayak. The waterproofing is not tested but at least it provides a basic isolation for salt water environments.

The measures are 84.5 x 40 x 7mm when opened. It can take at least 1 or 2 Allen keys, depending on the size.

I designed it to be printed in flexible TPU.

Note: I made little 1mm supports on the cap that can be removed easily with pliers. Afterwards the case can be closed.