Title is the link to a pencil I discovered in my collection.
It's out of manufacture.
But I found some other scoring pencils made by Dixon.
It's a very buttery and fun lead to draw with.
The sketches are incidental to the feel of putting the line down.
So I recommend finding an office supply with scoring pencils.
I added another sketch that combines the three pencils I've been working with. It's probably no more complex than discovering I like the equivalent of a 4b pencil.
The Blackwing 602
The Final Chapter