The fine tip can slide past weather pack seals to probe connectors.
As acupuncture probes, they are used for piercing the insulation of wires to allow for automotive electrical measurements without causing damage to the wires.
They can be used as pin-tip probes while working with small circuit boards.
The set of 5 probes also comes with 20 replacement pins, there's no need to replace the whole probe.
Its small diameter, extra sharp pin makes it ideal for piercing the insulation on small gauge wires.