Red Arrow Markers is more than just a ball marker, it helps align the ball to the hole is one of many features. Using the Red Arrow to mark the place of the ball helps reduce penalty strokes when not replacing the ball back in the same spot. The long Red Arrow lets you visualize the line from the marker to the hole easier and improve green reading skills. The horizontal line isn't just for looks, it helps you read the slope or angle of the green. No matter what size marker you play with make Red Arrow Markers the one for you!