Last week I found an old Lee Loader for 20 gauge shotgun shells on eBay for a very good price so I snagged it. It's basically new-old stock and came complete in the cardboard box with instructions, loading data, and all the parts.
The kit that I bought dates from the 1960s, before Lee changed their shot dippers over to plastic. It's made from aluminum. There was some corrosion on it preventing me from pulling out the inside part to increase the volume of shot.
After letting some Kroil soak into it for a few days, I used this set of soft jaw pliers to rotate the inner sleeve and break it free. I was then able to pull it all the way out and clean the corrosion off with 0000 steel wool.
I originally bought the pliers to help removal of the cap for the CO2 cylinder chamber on my QB-77 pellet rifle. Since then, they've come in handy for a variety of projects when I needed a good grip on something but didn't want to scratch it.
If you do any kind of home gunsmithing I highly recommend picking up a set.