, Name: Golf track paper Function: can correct the trajectory of the putter, Help you practice putting stability Use tutorial: as shown 1. You can start practicing after fixing 4 corners with 4 balls Tee 2. The template can feedback the running trajectory of the club head 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 surface between the trajectories size: 78 x 21.5cm Material:PVC colour:As shown Package Contents: 1 x golf track paper Only the above package content, other products are not included. Note: Light shooting 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.