So long as the screws do not have loctite on them (in which case heat it up) then even a clapped out cheap screw driver should be more than sufficient. Mine are as cheap as they come, but as long as I run them over a sharpening stone then then for the single task at hand, they perform no different to the fancier offerings (given many here won't touch a bracelet without the manufacturers own toolkit, it may be a controversial opinion, but it really isn't that hard to use any old screw driver if in good shaoe without mauling a bracelet). The issues tend to arise because if loctite and having to apply too much torque.