This is probably the best use that you can get from a ruler 🤣.Putter by @shopreapergolf .Finding a metal ruler is a perfect way of helping you to keep your golf ball on its intended line while also checking to see if you are doing it correctly as well. (you can do it with anything that is quite long and narrow (just enough to fit a ball) and also being quite sturdy) .If you align it at a hole, or any sort of target point for that matter (as it can also be done indoors) then all you have to do i