It's your own sharpener, but if you think you can use it, go ahead! 自分用シャーペンですが、使えそうならどうぞ!
It may not be the same as the default sharpener...
But I felt that it was somehow different and I played with the settings, so I will use it separately by myself.
Personally, it's easy to use, so if you're interested, please do~.
Is it possible that it can be used for line drawings as it is? Perhaps?
Postscript:
I often use it by lowering "brush density" or changing "combine mode" to "burn (linear)" depending on my mood.

デフォルトのシャーペンと変わらないかもしれない…
でもなんか違う気も設定弄った気もしたので自分で別に使う用うpです。
個人的には使いやすいのでもしご興味あればどうぞです~
そのまま線画とかにも使えることもありそう?かも?
追記:
筆者は、 「ブラシ濃度」を下げたり、 「合成モード」を「焼き込み(リニア)」にして気分で変えてよく使っています

mechanical pencil シャーペン