Some bracelets, like the Planet Ocean bracelet, have internal friction tubes that grab the pins, instead of the pins being split, and "gripping" by themselves.
These bracelets with internal friction tubes are VERY VERY difficult to size without the proper long-sized punches and a sizing anvil. Many people here, including the Pros, break and bend these pins even tho they are being very careful.
So, your mileage may vary.
A little pin removing vise is fine for some bracelets, but a hammer, anvil, and long pin punch is needed for others.
*** What a pin vise may look like ***
*** What a Hammer/Anvil/Punch set might look like ***