Brand: Tabata Product Name: GV-0366 Sankaku Sensei FIT Hit a nice shot with a swing trajectory that emphasizes a triangle!! *To fit within 3cm thickness, the product will be removed from its outer box, and the outer box will be folded and shipped. Please understand this before purchasing. The Sankaku Sensei FIT is fixed to the forearm of the left arm with hook-and-loop fasteners, and used by sandwiching the arm in the groove on the outer circumference of the product to maintain a precise triangle. By repeating swings while maintaining the triangle of both arms, this product aims to help you grasp the basics of body rotation and the knack of maintaining the triangle of both arms, from drivers to irons and putters. ■ By maintaining the triangle of both arms, it helps you learn ideal body rotation. ■ Supports practice with all clubs, from drivers to irons and putters. ■ Easy size adjustment. Adjust the size by inflating with air, fits anyone. ■ Fits in your golf bag. It becomes compact when deflated, making it convenient to carry. Material/Main body: PVC (surface flocking processing), check valve: non-phthalate PVC Ships via Click Post. *Please refrain from price negotiations. Item: Swing training aid