66M to 2 Pin Modular Adapter (USOC)
Fits over the pins on a standard 66M Block (won't fit on a 66B Block). Brings the pins out to a 2-Pin Modular Jack so you can use any two wire modular tester or phone.
This is the 66 to Modular Adapter that's included with our Deluxe Loop Current Tester.
NOTE: because of the size, you can't use these Adapters on adjacent lines (pins) on the 66M Block.