The size of screws will vary:
Rolex Oyster: https://www.amazon.com/gp/product/B00EVIIBLC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Rolex Jubilee: https://www.amazon.com/gp/product/B00EVII96Y/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1
This is what I use https://www.amazon.com/gp/aw/d/B00EVIIBLC?psc=1&ref=ppx_pop_mob_b_asin_title
Here's a screwdriver: https://www.amazon.com/dp/B00EVIIBLC/?coliid=I3DTXIQVLKPDIC
If you need a spring bar tool for switching the bracelet entirely: https://www.amazon.com/dp/B07561BHVF/?coliid=I1W39QC7XJ6S9D
Bergeon 55-686 6899-AT-160... https://www.amazon.com/dp/B00EVIIBLC?ref=ppx_pop_mob_ap_share