Features: 1. Golf training aid designed based on fundamental golf swing principles to help players develop proper swing mechanics and correct common issues such as the hook, enabling improved shot accuracy. 2. Installs by sliding the sleeve from the clubhead toward the grip. The laser unit attaches at the base and aligns with the clubhead. Once installed, adjust the sight left or right until the laser beam is perpendicular (90 degrees) to the clubface for precise alignment. 3. Powered by 3 x LR44 button cell batteries. Features two modes: "INT" (Intermittent) mode emits a 10-second pulse to conserve power; "CON" (Continuous) mode emits a constant beam until battery power is low. 4. Universal fit for most golf clubs. Compact and lightweight design ensures easy portability. Attaches securely to your club without adding noticeable weight. Specification: Material: ABS Color: Black Size: 5 x 2 inches Weight: 100 g Package Includes: 1 x Golf Training Putter Tool