This slim, portable design allows you to practice anywhere. Do you ever find yourself practicing putting on a crowded golf course, having to be mindful of others? As someone who is shy and introverted, I was hesitant to join others in aiming for the cup. So, I created a tool that allows you to practice putting even in the corner of the practice area. It's a thin, portable design that can also be used at home, making it a win-win. I found it so helpful that I'm now selling it. If you're in the same situation, please consider purchasing one! And even if you're not, please do! This tool helps you check if you're hitting the face straight. The opening width is approximately 59.5mm and the height is approximately 49.5mm. The ball and tee are not included. The price is for one black practice tool. You can practice at home or quietly in the corner of the course's putting green when it's crowded. It stands on its own by inserting a tee, making it convenient to carry. However, it may wobble slightly. * When standing with a tee, it will be slightly tilted, so the opening height will be about 5mm lower, but the ball can still pass through. It can be used in place of a cup when laid flat. Due to being a 3D-printed product, it has unique layer lines. Please be aware of this. An improved version with dedicated legs is also on sale. Item...Putter Practice Tool