This is the J-Glove, which assists with basketball shooting. It's a shooting aid designed to help you learn the correct grip, setup, and release for J-basketball. The J-Glove uses finger splint design technology to prevent premature finger flexion at the base and middle finger joints. I used this during shooting practice. I'm selling it because I've gotten good enough at basketball that I don't need it anymore. Size M (for junior high school students to high school students) https://amzn.asia/d/4Ahx0iY