Those can be used. I make sure that ones I use will take solder.
There are also some that are used for general electrical work that can be used.
The tool for those sort of crimps them into a "U" shape.
Insulated automotive ones are likely the most common, although different sizes
can be hard to find. I've occasionally had to use the crimp part of an eye or
spade connector by cutting off the unneeded part.