Sanding Tool for jewellery

i love making pendants, rings and similar stuff out of silver or nickel silver, (or alpaca as we call it in Argentina).

one of the more tedious tasks is the sanding.. and some times there are small parts where only sand paper could be used but handing it with the hand or the common sticks was not good enough or confortable, so i made this lil tool based on the typical jewellers' saw, which made the sanding way faster and easier.

Items used:

-2x M5 nut and bolt (or a smaller M4 if you ha