I worked at dealers back on the day. I have done a ton of these. I have always used a slightly curved pick and a small flat blade screwdriver at the same time to work them off. Once you have done a few, it goes pretty quick. To reinstall, just push it back down in the groove.
I don't know of a...
They were most commonly used to open beer bottles and cans.
I always assumed it had something to do with alcoholics finding religion.
Also I worked at a Shell station 1979-81, we had a paper can "Fire and Ice" display out on the full serve island. We were under orders to push the 10W50 because...
Went to about 10 sales, only one had tools.
Best buy yesterday was this -V- crowfoot set for $8.
Also got a Lisle "Jeepers Creeper" $5, a dremel tool in case $5, CM MM deep socket set ($5), CM drum brake set (unused, $10).