Why would I choose the P6419 over the other P6400 series probes?

Why would I choose the P6419 over the other P6400 series probes?

The P6419 probe is a connector less probe that compresses onto pads that have been laid out on a board under test. Advantages are ease of connection to a run of circuit boards and reduced expense not having to install square pins or other connectors. This connection also takes up half the space of what a general purpose probe would take.