In the models they are present 5 keys for dice and bolts that go from the measure 6 to the 10mm, excellent for the modelling and to climb on printed components with the printer 3d.
They are provisions of two entrances for the bolt, a half-open and a completely dam.
In the section material I put you the filament that I have used, and a set of good keys for bolts and dice of metal.
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