Fiber Optic SOC-3 Adapter MT-RJ Ferrule. Provides direct connectivity for Tempo FiberTOOLS to a wide range of industry-standard fiber optic connectors. Adapter design ensures maximum accuracy and repeatability when performing critical measurements on fiber optic systems. Easy to clean and use. Single-mode and multimode compatible. SOC adapters are compatible with both PC and Angled APC physical contact interfaces. SOC (Snap-On Connector) adapter is used on 556MT Optical Power Meter.