special tool? no, I just use slip pliers and a 45-degree needle nose is all you need.
i guess if you really want one one of these would be helpful for the larger radiator clamps
found on another thread currently looking at replacing all the stupid worm drive clams and toyota OEM wire clams with OEM spring clamps
been trying to find a list that had here is what I have seen here on mud. feel free to add to the list
wire hose clamps => constant tension band clamps...