Econoseal and JPT Crimping tool
Those who make their own harness looms (crimp wire to Econoseal or WBO2 or injector recepticles), will probably want one.
This tool supports 3 wire sizes with it's installed head (removable head), the smallest jaw marked 0.5 .. 1 mm2 is suitable for Econoseal and JPT (WBO2, injector, and many other connectors). The biggest jaw is good for common size relay and fuse connections.
There is good chance your existing crimping tool supports Econoseal recepticles.
molex crimping HOWTO