Get a jump start on tuning your bow with the Tru-Center 2.0 Laser Aligner. Easily mounts with toolless knobs, it provides quick references for cam, arrow-rest and center-shot alignment. Durable aluminum construction promotes longevity, while a built-in bubble level ensures accuracy. 360 rotating head and pivoting body design allow use with both right- and left-hand bows. Highly-visible 3mW red laser is powered by three LR44 batteries (included). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Alignment Lasers.