Use tutorial: 1. You can start practicing after fixing 4 corners with 4 balls Tee 2. The template can feedback the running trajectory of the club and whether the face is correct 3.The face is too open or too buckled will be reflected in the angular deviation between the actual face and the parallel trajectory 4.The face is not square, which directly leads to the deviation between the ball's running course and the target hole cup. 5. There are three pairs of holes in the middle to set the goal. There are deviation ranges of 0.5 / 0.75 / 1 degree. The correct putter can pass the ball through the middle of the ball T. 6. Inserting T on the trajectory line can set a more accurate trajectory, limiting the putting between the trajectories Colour:White Material:PVC Package Contents: 1 * golf track paper Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. High Wear- and excellent durability. Function: can correct the trajectory of the putter, Help you practice putting stability Name: Golf track paper 100% Band new and high quality Fine workmanship and perfect style.