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Three versions. Each one has two files named 01 and 02.
The model B is plain and the nuts stand above plastic.
The model C can hide the nuts.
The model "C mosq" has a hole to attach a carabiner.
You should use to attacha a pair number of keys or attach two groups with similar thickness.
You will need:
- 2 M3 locknuts
- 2 washers
- 2 M3 allen bolts
Better with inox alloy.
To measure the bolts for standar keys approximately:
(2.4mm · keys) + 8mm
Five keys will need a 20mm M3 bolt.