The FoPro universal fiber probe is suitable for fiber-optic testing applications such as insertion loss, return loss, and power measurements. The 2.5-millimeter universal ferrule design eliminates the need to have multiple mating adapters and cables on hand. The device is useful for probing male or female multi-pin connectors. The gimballed ferrule holder helps prevent breakage of probes and connectors under test. An anti-rotation grip prevents the user from inadvertently damaging or grinding the ferrule contact surface.