vise enless based on 15x15 mm Profil

15x15 mm system for square tubes from DIY store
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material:
3x M8 nuts
M8 threaded rod
M8 washer wide
4x M5 screws
4x M5 nuts

one big star grip wtih 2x M8 nuts

for a lot of self printing grips see here:
http://www.thingiverse.com/thing:845951


2x 15x15 mm profil alo or steel

0.8 mm shell and 25% filling are very stable. If necessary, use more material.

The carriage could be improved.
The nuts fo