I customized the grip of a Dr. Grip 4&1 with Purpleheart wood. It can also be used for the Frixion Ball 3 Metal. It has a combined finish of glass coating and beeswax wax. This listing is for the grip parts only. Please note that the metal tip and the pen body are not included. Only the parts in the last photo are included. I am not considering discounts. There is no warranty. It will be shipped via Nekopos. Shipping will be on weekends due to my schedule, so it will take some time. About Purpleheart: It is distributed in tropical regions from Central and South America to southern Brazil. Immediately after being sawn, it has a vivid purple color that you wouldn't believe is natural, as the name suggests, and it gradually changes to a dark purplish-brown color when exposed to ultraviolet light for a long time. Despite its flashy appearance, it is a material with excellent durability and decay resistance. Thank you for viewing. I love stationery and use Jetstream and Dr. Grip 4&1 pens. I dislike the deterioration of the rubber grips, so I started making them for myself using scrap wood from the famous trees I had collected. You can customize these practical pens to your liking, just like changing your smartphone case. I hope that my wooden pen shafts and wood parts can be of some help in your daily work, studies, tests, certification exams, and entrance exams. If you like handmade wooden pen shafts, or if you like the works of wooden pen shaft workshops such as Craft A, Nohara Kougei, Koubou Setsuri, Kobuta Koubou, etc., or if you like multi-function pens such as Jetstream 4&1, Dr. Grip 4&1, and Pure Malt Premium 2&1, how about it? I make them using famous woods such as Karin瘤 (Karin burl), Karin Kouhaku (Karin red and white), Snakewood, Pink Ivory, Desert Ironwood, Kurogaki (black persimmon), Kurogaki Kujaku Moku (black persimmon peacock grain), Beniki (red wood), Ebony, Rosewood, Sandalwood, Palo Santo, Briar, and Rosewood. #jnsm