The Wheeler® 30mm Scope Alignment and Lapping Kit is a professional-grade kit, designed to make installation and alignment of your favorite rifle scope a breeze. The alignment bars in this kit protect against misalignment for enhanced accuracy and reliable field service with any hunting or tactical rifle. The lapping bar is used to lap and trim the rings to improve alignment for reduced stress on the scope and improved reliability, while the included lapping compound quickly removes burrs and uniformly laps your scope rings for a precise fit and finish with virtually any tactical or hunting rifle scope. Made in USA.