Originally Posted by BV

no no no
dam man
you are that slow?

on the net billing lighter (bic)
the metal spring tab that wraps around the center of the thumbwheel
that is a safety

before that they had a plastic piece that had to be released in order to depress the valve

the metal tab is the new version a couple years old

the metal spring requires more pressure to spin the wheel



the other lighter in your pics
the thumbwheel is spring loaded and has to be pressed down a ways in order to make contact with the flint

here is a nice video to help you along in this great challenge