Use this economical scope mounted level to ensure your reticle isn’t canted when shooting long range. Just a few degrees of cant will cause considerable shot dispersion at longer ranges! Proudly printed from PETG polymer, with a metal thread insert for bolting strength. Streamlined design sized to sit just over the side-focus knob on almost all optics, but not stick out too far and snag on objects. Hinged design installs quickly and is low profile enough to fit under most optics without removing for install, with only one bolt to tighten, preventing fiddling with two bolts for a perfect setup.