Scientific Design: Golf Putter Plane Golf Training Aid. The putting helps align and visualize your perfect putt,and to help players master the correct feeling on swinging ball,which can quickly corrected the right hook.So the players can master the shot correctly. Easy to Install: The rod sleeve is pushed from the rod to the grip direction. The putt laser is pushed from the lower part aim at the mouth of the bayonet and pushes up. After the installation is successful, adjust the left and right until the laser line is 90-degree perpendicular to the rod .Then you can use it with confidence. & Portable: Fits easily to any golf club.Small size and easy to carry. Placing this plastic golf putter on your golf club, you don't feel so much weight on your golf club as it is so . Consistency: By using a golf training regularly, you can develop consistent swing and putting techniques that will help you play better on the course. Made of high-quality ABS material, making the product more Colour:Black Material:ABS Size:13x4.5x0.8cm Package Contents: 2 * Golf laser aligners Only the above package content, other products are not included. Note: Light reflection 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.