The Wheeler Scope Ring Alignment and Lapping Kit should become the standard practice whenever a scope is installed on a quality firearm. Alignment bars provide for perfect alignment of both rings and will also diagnose any misalignment problem, vertical or horizontal, giving you the opportunity to fix the problem before damaging the scope or experiencing frustration at the range. Lapping scope rings increases the surface area of contact between the inside of the rings and the scope tube. This creates better holding force, keeping the scope much more secure.