Customizable hexagonal dumbbell molds
thingiverse
These are customizable molds for concrete dumbbells. They include a guide for the rod too be glued inside (I used a wooden rod). I printed mine thin (1.2mm) and then they peeled off the concrete (except near the guide at the bottom). If you print yours thick enough, you should be able to get plastic-encased weights. The default is for 33.5mm rod and 25 lb dumbbells. Build instructions are [here](https://www.instructables.com/id/Hexagonal-Concrete-Dumbbells-From-3D-Printed-Molds/).
With this file you will be able to print Customizable hexagonal dumbbell molds with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Customizable hexagonal dumbbell molds.