If you're working on a pinball project you'll need a good crimper. This one does the .100 and .156 connector pins that are common to most connectors in your pin. It plus a leaf adjustment tool are the only real specialty tools I've need thus far for my pin repairs.
HT-225D Full Cycle Ratchet Crimping Tool with interchangeable die set HT-225D https://www.amazon.com/dp/B007JLN93S/ref=cm_sw_r_awd_RqVxwbTFG2M5X