Standard in every pinball technician's toolbox should be at least one
'L'-shaped contact adjuster. These tools are merely metal rods with a slot
in the end. However, sometime you may find yourself trying to fix a machine
without your tools. In this case if you need a contact adjuster you can ask
around for a child's tinker toy. They've got the slotted end which works
just fine as a contact adjuster.
Keith Stelter pinGame journal, #34, September/October 1994, pp. 42