Originally Posted by
rosefarts
A chain tool has two "rows" the first is the one you put your chain in to push out the pin. The second thicker one, is for giving a stiff link a tenth of a turn and loosening it.
It's still on every chain tool even though it's been an obsolete feature for nearly 20 years.
Unfortunately not on my Park CT-3.2. It has a single sliding shelf. When I encounter a tight link after pressing a pin back in, I reach for my old cheap Cyclo tool.