I've customized the grip of a Dr. Grip 4&1 with colorful acrylic resin. It can also be used for the Frixion Ball 3 Metal. Finished with a thorough polish for a shiny look. 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. No warranty is provided. Shipping will be via Nekopos. Shipping will be on weekends due to my schedule, so it will take some time. Thank you for looking. I love stationery and use Jetstream and Dr. Grip 4&1 pens. I dislike the deterioration of the rubber grips, so I started making my own 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. If you like handmade wooden pen shafts, or if you like the works of wooden pen 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 use high-quality timber such as Karin Ko-bume, Karin Kouhaku, Snake Wood, Pink Ivory, Desert Ironwood, Black Persimmon, Black Persimmon Peacock Grain, Red Sandalwood, Ebony, Rosewood, Sandalwood, Palo Santo, Briar, and Rosewood. #jnsm