This is a portable pinch and crimp block which can be used with up to 9mm rope, the original is made out of wood and i copied the design which can be 3d printed. 

I would highly recommend to sand all the surfaces for better grip, i personally used 60 grit.

Feel free to modify the design as the f3d file is included and upload your remixes 

Very big thanks to Dedlok#5332 for having the idea to include the holes for the rope into the model and actually designing it!

Print settings

5 Perimeters, 5 Bot and Top Walls, 20% Rectilinear Infill and no supports
I was able to hang of that with my whole body weight, so crimp training with up to 25-30kg should be very fine