Welcome to our product description Here are the 5 key points about our golf ball marking tool: 1. **Size**: Basic size is approximately 7.7 (3.03") x 5cm (1.97"). Model size is approximately 4.8cm (1.89") x 3.9cm (1.54"). 2. **Contents**: The set includes 1 base marker and 6 different designs. The set features 6 interchangeable designs, each offering various patterns or stickers, providing you with numerous choices. 3. **Durable Material**: The ballpoint marking tool markers are crafted from high-quality plastic, ensuring durability, odorless and non-toxic, making them safe for your use, and capable of lasting a long time. 4. **Design**: The clamp design makes it convenient to use, allowing for an easy grip on the ball and the ability to draw straight and neat lines on the golf ball, aiding in fixing the position of the ball. 5. **Easy to Use**: This golf ball marking tool is easy to align. By marking the front and back sides of the ball, it helps in aligning your putter face perpendicular to the target line and also aids in identifying your ball. We hope you find this information useful. If you have any questions, feel free to reach out to us.