That would be the screw drivers you need yes,.. but you will need more basic tools eventually..
check out Watch bitz.. the "tool kit" is a steal and has all the basic tools you'll need from bracelet sizing to taking it off and much more.. with replacement blades and spring bars..
go >Here
you may want to use some locktite bolt fastener with the screws, they have been known to pop out..
AC/Lani