Improve the accuracy of scoring: Auxiliary equipment can enable the player to accurately grasp the spatial relationship between the target bag, the object ball, and the parent light bulb, thereby improving accuracy. Eliminate visual errors: The left and right eyes produce two different images that enter the brain and produce errors. It can help you with precise positioning and help practitioners establish correct habits and methods. Correcting the action of the bar: After connecting the ball to the device, all slight deviations in the swing will be reflected by the device. Allows you to see previously ignored incorrect operations. Very suitable for beginners: Using auxiliary equipment, you can cover all possible shooting angles and lengths! Even better, the device is also designed to draw a line on the table, so direct play will become a breeze. Widely applicable: Pool cue auxiliary device suitable for various pool cues, two brackets can be used interchangeably according to the situation, which can help you quickly become a professional, and it is also the best gift for beginners. Specification: Color: Black Material: Metal Size: Approx. 10x10x5cm/3.9x3.9x2.0in Package Includes: 1 Piece Cue Laser Sight