Review on Enhance Precision with the David White D620 Sighting Level by Josh Allen

Built like heavy metal armor, this item should last forever. At just a few dollars more than cheap plastic scope spirit levels, this is a bargain! I tested accuracy by aiming at eye level on a jetty about two miles across the lake and the bubble was dead center. The only downside I could find is that the bubble is hard to see in a dimly lit room. It works best outdoors or indoors with a bright overhead light (so there's enough light coming in through the small window above).