Ball Badge Aim Stripe - 360 Degree Golf Ball Line Marker Kit with Golf Bag Attachment - Golf Ball Alignment Marker Tool - Full Metal Alignment Ball Marker - Putting Alignment Tool

Simple but effective.

Lets just start with, i just purchased this product and have only used it for 10min. In that time I have marked 3 boxes of balls with my prefered ball mark 180 deg thin line, lined up with the balls short alignment line. Fantastic product, I have used every type of golf ball line stencil and this is my favorite. It's easy to align, fast, simple and robust. If you like a simple very straight line on your ball, it's worth the few dollars more over the finicky plastic stencils. No readjusting to get a longer line. No breaking sharpies trying to spin it around the ball. The thickness of the line is set by you not the stencil. I bet this one won't break in my golf bag when it get put in the trunk. Great product glad to took a chance on a product with no reviews.

This golf ball line market kit has the potential to be the best design on the market, but it has a major flaw. Using thick markers creates a line that is off center on the ball. It works fine with thin marking pens but those don't leave a thick line that is easier to use on the putting green. I might experiment by grinding away a little metal so that an ear tag pen or other thicker pen will leave a line dead center, right on the equator of the golf ball. (For reference, a thick line is no wider than 1/16", not a magic marker.)

The only way to mess up using this thing is if you get crazy with the sharpie.

I was a little skeptical at first, once I realized if you push it down it won't spin.