Didn't want to buy modifiable weights on the market as they are quite expensive, so I printed myself a case to hold M16 bolts. And this way you can have them your favourite colour too.
Might want to try out different sizes of handle vs holder to have a nice fit.
These halters can go from 150gr to 2.5kg based on how many nuts you put in them, and if you add the thread inside to weight them up a little more.
The author hasn't provided the model origin yet.