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If you enjoy playing golf and are trying to improve your putting game you probably find that there is so many things to focus on and its hard to work out which one needs fixing. A great way to start is with a line marking jig. It allows you to accurately mark the centre line on your golf ball. When you line up your golf ball's centre with your target its one less thing to worry about. Instead of buying a shop bought jig which can be hard to find and expensive to buy try this quick and easy instructable.
Step 1Make a 44mm hole in some 12mm ply
take a piece of 12mm ply and cut it into a rectangle 70mm by 90mm. Use a holesaw to cut a 44mm hole through it in a central location.