This is a badminton shuttlecock keeper/knock training shoulder strap. By wearing this on your back, you can do shuttlecock feeding for knock training by yourself. You can use it regardless of whether you are right-handed or left-handed by changing the direction you wear it. Approximately 40 shuttlecocks can be set. (Shuttlecocks in the photo are not included.) For fast-paced knock training, it is easier to hold two shuttlecocks at a time. If the tube is too long, it will interfere with your racket when doing downward smash-style knock training, but this length prevents that. The position of the shoulder strap and the shuttlecock outlet are offset to prevent interference. The semi-transparent tube makes it easy to see the remaining shuttlecocks. I am also working on improving the product while using it myself. March 2020: The joint has been improved to be on the inside. Even if you touch the joint, your hands will no longer get scratched. If you have a preference, the tube can be made longer or shorter. Please feel free to ask. *Additional charges will apply if extra materials are required. Please understand that as this is a handmade item, there may be some variations, minor scratches, or dirt. You can freely choose the color of the tube and the strap. Please note that it may not be possible to create it depending on the stock of raw materials. Tube colors: Pink, Yellow, White Strap colors: Green, Pink Discounts are available for multiple purchases. ¥900 discount for the second item and subsequent items. Please comment with your desired colors and quantities. If you have no specific requests, we will ship white. #Shuttlecock #Case #Magazine #Knock #Badminton #YONEX #MIZUNO #BABOLAT #adidas #Wilson