[Ball Marking Kit: Include a hemispherical black tri-line stencil and a green spring clamp with cross and arrow templates. Golf Ball And Marking Pens Not Included! Spring Clamp: The firmly closed clamp encases the ball tightly making it easier to draw neat and straight lines around the entire circumference without any adjustment. Tri-line Stencil: The tri-line stencil help set 3 parallel lines around the ball that assists you to figure out the correct swing direction and then make a good stroke. More Accurate Putt: These linear alignment tools make recognizable marks to help aim at your target accurately and improve your confidence. Greatly increase your shot possibilities. Portable & Reusable: These stencils are made of heavy-duty plastic and endure constant use. Just throw them in your golf bag to carry them anywhere due to the light weight.]