Update: The largest hole is now properly sized to fit a 10 mm key. I apologize for the inconvenience if you printed the old version (ended in v10).
At 40 mm in diameter, this will fit in shallow toolbox drawers if you align the keys in parallel as pictured. Even arranged so, you never have one blocking the other like with the flat organizers!
Allen key sizes: 1.5, 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 7, 8, 10
The holes are designed for a slip fit and the o-ring is what holds them in. Use a 30 mm ID o-ring to hold them in nice and sturdy.
No supports needed.
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The author marked this model as their own original creation.