What's your application?
Does the crimp have to meet any military or industrial specification?
Is this just something you're doing as a hobby on the side?
There are a lot of generic crimpers that will work, but if you're doing something
that has to meet a standard, you need to stick with what the manufacturer recommends.
If you have the part number, you can contact the manufacturer and find out what types
of crimpers they recommend for your connectors.