The MegaLine® Connect 100 series Jack mounting tool (Part number: LKD9A9040070000) from KERPEN DATACOM is a Keystone Jacks. It is a . Keystone jack is a female connector used in patch panels, keystone plates and keystone boxes. They are flexible and provide an easier installation, so to make a connection, the keystone jack must be pushed into a port and it positions itself easily.