Place jaws of tool over roller with push-out pin centered on chain pin.
Tighten down by turning top handle clockwise until chain pin loosens, driving it partially through thr link plate. Do not force pin all the way through link plate as pin plate will bend and damage roller link.
Follow same procedure on other pin of the same pin link.
Return to original pin and force completely through pin plate. Do the same on second pin freeing link plate from the pins.
Remove disassembled pin link from the chain