Use : Place the Turret on the top cap and the Action the bolt ; once the levels show a , and then simply tighten the rings down With strong magnet in the bottom for easy easy use Accuracy : With bubble to crosshairs are aligned for in line placement and doping adjustments The bubble for shell is acrylic , designed for scoperifle levelingCompact : The for shell is acrylic and , easy to use and compact size for storage Easy to use and compact size for storage and transport, Manufacturer: Watreketal