This is an indoor golf practice tool. It has four sides and can be used for various games and practice. I bought it for practicing with real balls, but since the floor is hardwood, the sound of the ball hitting it when it missed was too loud for my family, so I only used it once. When opened, the four sides unfold, and each side with a diameter of about 620mm can be used. When folded, it becomes about 340mm in diameter. The box size is about 350 x 350 x 50mm, and it comes with 3 balls with Velcro. There was no instruction manual. It's a simple one-touch folding and unfolding system even without instructions. Like new. I think it was cheaper when I bought it, but on Amazon, it currently costs 12,174 yen.