The DAK55-4B insertion tool is used to install size #4 pin & socket contacts into the connector housings.
The DAK55-0B insertion tool is used to install size #0 pin & socket contact into the connector housing.
This tweezer type installing tool (EDMO# DAK264-8) is used for rear release connectors, has a 0.317-inch outer diameter, and 0.277-inch inner diameter.