Mid Ten Reticle Levelling Tool with High Precision Bubble System - GoldEasy Use The reference level is equipped with an ultra strong magnetic bottom for steadier placement on the turret cap. Smaller bubbles provide more accurate calibration. The reference level aligns easily with the clamp level. Higher Accuracy Optimized calibration distance All levels are carefully checked before leaving the factory. The integrated bubble effectively enhances precision especially at long range Premier Craftmanship Non marring pads on