Oh, It's just my name for it haha. It's really the "flat" brush you need, which is a standard brush. Actually googling can help you with that right away, I don't really have the time to upload it for you now. But this youkomi.deviantart.com/art/sai… can probably help you
Also you can try the settings with different brushes to get different results. The thing with this one is that it doesn't blend as much and keeps hard edges, great for painting in the beginning.
You're very welcome C: Remember that you can have several brushes, so you don't have to change the settings of those that already exists. Just right click an empty "box", choose the brush type and change the settings as much as you'd like. (You might know this already but i said it in case you didn't. )