Micro Skate Tool
thingiverse
Micro sized skate tool This only has 9/16 for adjusting your kingpin and 3/8 for tightening your truck bolts. However it is primarily intended for quick kingpin adjustments. It is small enough to fit in a wallet, phone case, key ring, or you can even attach it to your shoe laces. EDIT - I added a version 4 which brings the 3/8 wrench closer to the edge for better clearance.
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