This complete kit provides everything necessary to mount virtually any 1" or 30mm scope the correct way. Proper scope installation is critical to the accuracy of your firearm. Alignment and Lapping of rings ensure maximum surface area contact between scope tube and rings. This not only helps the rings hold the scope more securely but also protects your scope from damage misalignment can cause. The Wheeler Alignment Bars, Lapping Bars and Lapping Compound allow you to achieve the perfect fit between scope and rings. The Wheeler Level-Level-Level makes it quick and easy to get the reticle perfectly aligned with your gun. Professional grade bits and the F.A.T. Wrench are the perfect combination to properly secure fasteners without deformation.Complete list of components:F.A.T. Wrench torque screwdriver, 10 Gunsmithing Screwdriver Bits, Level-Level-Level, 1" Scope Ring Lapping Bar, 30mm Scope Ring Lapping Bar, 1" Scope Ring Alignment Bars, 30mm Scope Ring, Alignment Bars, Lapping Bar Handle, Lapping Compound and Thread Lock.