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Golf Ball Stencil: Unique golf ball line marker helps you align your putt with the intended line or break
Visual Golf Aid: Our golf ball marking stencil offers a visual aid designed to ensure that your eyes are directly over the ball at address
Improves Aim: Our golf ball line marker promotes proper aim and square putter face at impact
Includes: Our golf marker set includes a permanent marking pen and a poker chip ball marker with additional alignment aid

From the manufacturer

The golf marker set includes a permanent marking pen, a poker chip ball marker, and additional alignment aids.

Golf ball marking stencils ensure that your eyes are directly over the ball at the address.

Golf ball line markers promote proper aim and a square putter face at impact.