What tool can get the Technic pin out from a connection closed in the other end? I'm having trouble removing these LEGO Technic pins apart from their connectors and I don't want to use carpenter tools like pliers which may damage the bricks.



What tool can get the pieces separated without force that damages the pieces or my fingers?
Push the Technic pin in a beam hole, then insert a rod (antenna or minifig tool handle) into the hole in the pin from the other side. The rod will prevent the "lips" of the pin from closing in, therefore preventing the pin from leaving the beam. Then you can pull on anything attached to the other end of the pin.

This example below shows the removal of a pin from a beam: