Buy a decent pair of aviation snips to cut metal corset boning.
As I will advise with most tools. Buy the best one you can afford.
There are a lot of very similar-looking snips out there. Often the metal quality varies. If they say “German-style”, usually they are cheap imitations and are not value for money even if they are a tenth the price. Always buy REAL German ones!
They must have serrated blades, not smooth.
Mine are German steel straight cut (you can get left and right-angled positions too). Costing $45 in 1998; I have used them for 19 years. They are still good and make clean cuts.
As an experiment, I also bought a pair for $10. They lasted about 4 months. Plus even though they were new they were tough on my wrists and the bone would often bend in the blades.
If you are planning to make several corsets and costumes that will require boning.
Good quality Aviation snips are an essential tool and a clean cut is vitally important. Every other step for corset boning is built from a clean cut.