Make critical scope turret adjustments and horizontal axis corrections in low-light and no-light conditions with iota ZEROLIGHT, a revolutionary patent pending anti-cant device featuring LED illumination. Mounted to your rifle scope, the device’s contoured design is engineered to easily adjust for accurate positioning. A baffled-channel system navigates the LED light, guiding it through tunnels to directly illuminate both the elevation and windage turret marks and the anti-cant level. Built-in anti-cant to help you correct for inaccurate shot placement due to the canting of your rifle platform. Experience the advantage when you add ZEROLIGHT to your rifle system.