This unit gives you the ability to fine-tune arrow sights without shooting an arrow.  No more losing or damaging arrows. Hit the target with your first shot! This unit mounts directly to your arrow by using the threads in the insert. A very straight arrow and spin tester must be used to achieve perfect alignment of the laser beam and the arrow shaft before the unit can be used.

Product Detail:

• Includes arrow  laser aiming device and batteries
• laser output power = Less Than 5mw
• Material: aluminum
• Wavelength = 635-655nm