Which freewheel remover tool to use on vintage Columbia bike?
Take it to your favorite IBD- they can explain and illustrate much better. They might even show you how to do a destructive freewheel removal! Since bikes age in "dog years", and the correct tool to remove it (thick -boss Shimano) hasn't been made since the '90's), your shop may not have the correct tool unless they have been around for a while. IBD freewheel removal should be about $5 or so plus freewheel, if you bring just the wheel.