Turn it clockwise to remove it (righty-tighty to loosen the cap).

Screw the needle firmly onto the pressure rod (turn counter-clockwise / left to tighten).

Push the needle straight through the center of the cork until it fully penetrates. Hold the bottle firmly with one hand (cover the top/neck for safety).

Move the handle up and down steadily. Usually 4–8 pumps are enough – keep pumping until the cork slowly slides out of the bottle neck. (Stop immediately if you feel strong resistance – do not over-pump.)

Once the cork is out, gently pull or twist the cork off the needle.

Screw the protective cap/cover back onto the needle (counter-clockwise to tighten) and store the opener.