This battery-operated laser throw line marker is designed for dart games, providing a precise oche marking solution. Made of durable ABS plastic shell, it comes in multiple styles to meet different use needs. It projects clear, stable laser lines to mark the standard throwing position accurately, eliminating disputes caused by unclear or misplaced throw lines. Suitable for various dart game scenarios, including home leisure game rooms, professional dart training venues and pub entertainment activities. Easy to install and carry, it brings more convenience and fairness to your dart games.