Compact keychain

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 attach 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.