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You probably spotted it pretty quickly: It's the right line. It's slanted just one degree, whereas the left one is completely flat.

Why am I showing you this? Well, because it explains one of the reasons why mallet putters have been such a hot trend in golf right now.

Yes, the extra forgiveness is important, but off-center hits aren't usually the reason why golfers miss putts. It's misalignment.

And because mallet heads are bigger, it means the alignment aid on the putter itself can be longer. So what?

Well, simply put, crooked lines are harder to spot when the lines themselves are short. The longer the line, the easier it is to spot which one is pointing in the wrong direction—as you just proved.