What kind of screwdriver?

I need help finding a right screw driver for a Sanwa jlf standard mounting plate. I can’t seem to find any screwdriver that fit and capable of unscrewing that mounting plate. does it require a special screwdriver?

I’m pretty sure a small Phillips works fine.

For some reason the shape of the screw driver is important. I actually reccomend a large Phillips. I think the #3 worked best. I stripped one with one of the smaller screwdriver.

Posidrive #3 works very well.

I usually use a number 3.

I use one of the bit driver types of screwdrivers (the kind that is multibit) and make sure it has a decent length in the shaft to help give me more torque.