Keeping your scope perfectly aligned is critical to long-range accuracy. Canting your scope, even just a couple of degrees, can cause error in point of impact. With modern Drop compensating scopes, an Anti-Cant Indicator is a necessity. The Wheeler Anti-Cant Indicator ensures that your rifle is always held near perfectly vertical, eliminating any chance for Cant Error to cause a miss. Features: Indicates precise, repeatable level gun position any gun Easy to view from shooting position Attaches to scope, fold in when not in use Pic rail attachment attaches to any pic rail Precision machined aluminum with anodized finish 1 inches bubble level The wheeler anti cant indicator ensures that rifle is always held near perfectly vertical