Dụng cụ đánh dấu bóng golf - Ba đường thẳng

This is a golf ball marker, for marking 3 straight lines on a golf ball. It was designed as slightly more than half of a sphere so it sort of clips onto the ball.

I made this hoping that you would use a standard Sharpie on the middle line and thin Sharpie on the outside lines.

Enjoy!