Handmade carbon fiber mechanical pencil. Created using parts from the original drafting mechanical pencil MDS1 by Mishin Craft. 0.5mm lead diameter. Carbon fiber is a lightweight and durable fiber made by carbonizing acrylic fibers, petroleum, or coal at high temperatures. Although it is a thin thread on its own, it is combined with resin to create composite materials such as "carbon fiber reinforced plastic (CFRP)" and is used in a wide range of fields, including aircraft, automobiles, and sporting goods. Its main features are lightness, strength, and high heat resistance and corrosion resistance. For those who understand handmade items, how about it, including shipping? No warranty. Body only, no outer box or instruction manual included. If you wish to receive it at a convenience store, you can change it to Yu-Pack Mercari. Please comment before purchasing. The body will be wrapped in bubble wrap and put in an envelope and shipped by Nekopos. Shipping will be on weekends due to circumstances, so it will take a little time. Thank you for viewing. I love stationery and use Jetstream and Dr. Grip 4&1 pens. I don't like the deterioration of the rubber, so I started making them for myself using the scraps of precious wood I had collected before. You can customize these practical pens to your liking, just like changing your smartphone case. I hope that my wooden shaft pens and wood parts will be of some help in your daily work, study, tests, certification exams, and entrance exams. For those who like handmade wooden shaft pens, those who like the works of wooden shaft workshops such as Craft A, Nohara Kougei, Koubou Setsu, Kobuta Koubou, etc., and those who like multi-function pens such as Jetstream 4&1, Dr. Grip 4&1, and Pure Malt Premium 2&1, how about it? I use precious woods such as Karin Kobu, Karin Kouhaku, Snakewood, Pink Ivory, Desert Ironwood, Kurogaki, Kurogaki Peacock Grain, Beniki, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, and Rosewood. #jmsm