Some like blue steel Japanese chisels could possibly be part of an essential list if you were going to work with Japanese tools only, but the price tag and availability (outside of Japan of course) is more limited that western cabinet-makers chisels.
These are tools that you don’t really need, but you might want to get at some point just because you really want them. Some like blue steel Japanese chisels could possibly be part of an essential list if you were going to work with Japanese tools only, but the price tag and availability (outside of Japan of course) is more limited that western cabinet-makers chisels.