I've customized the grip of a Dr. Grip 4&1 with Brazilian Rosewood. 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 main 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. "Brazilian Rosewood" is also known as "Jacaranda" and is considered the highest grade of rosewood. The wood surface ranges from reddish-purple to dark brown with a purplish tint, and has black-purple stripes. It is dense and glossy, with little warping and excellent hardness, making it suitable for European court furniture, interior decoration, musical instruments such as guitars, wooden chess sets, and turned woodwork such as plates and bowls. Currently, "Brazilian Rosewood" is a particularly rare wood, designated as an endangered species by the Washington Convention and prohibited from being exported. Thank you for viewing. As a stationery enthusiast, I love using 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 high-quality timber that 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. For those who like handmade wooden pen shafts, those who like the works of wooden pen shaft workshops such as Craft A, Nohara Kougei, Koubou Setsuri, 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 create them using high-quality wood such as Karin Burl, Karin Red and White, Snake Wood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Grain, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, Rosewood, and Satine. #jnsm