The crimp tool WM9022-ND(0638190000) is to be used with the contacts from the micro-fit series. The contacts that Digi-key carries that work with this tool are in the following link.
Additionally the tool WM17552-ND(0640160201) can be used the contacts in the link below. This tool has a wider range of contacts that it is compatible with when compared to WM9022-ND.