Open M3 nut driver
thingiverse
It's a slighty modified version of M3 nut toll by fns720http://www.thingiverse.com/thing:57897 I've opened one side for better nut handling, and hollowed more the main one so even higer and auto lock nuts can be used. Instructions 0.2 need a bit file to hold nuts, i guess 0.1 would fit better. Printed in pla.
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