Bergeon 6767-SF Spring Bar Watch Bracelet Fitting Removing Tool Fine - HL6767SF
Well worth the outlay over cheap alternatives.
Good manufacturing precision and design quality make changing straps much less of an ordeal.
Demagnetizer Watch Repair Screwdriver Tweezers Electrical Demagnetise Tools -UK
Works well and excellent value.
You will need a USA-to-UK type adapter to plug it in. Cannot comment on long-term reliability but so far it has performed faultlessly.