Most of the Pinvises I have seen can take bits from 0.1~ 3.2/3.5mm.
Most of the sets that come packaged with the pinvise don't normally have very small bits in them, rather buy your own set or the drillbits individually.
Also check the material for the drill-bits careful, some materials are brittle and will snap easily.
One bit of advise for the Pin-vise, make sure that is has a swivel head at the end , some don't have(open ended) and it ends up as blister city for your hands.
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