About Us As the pioneer of DTC precision rifle optics, we continue to challenge the limits of quality and affordability. 15+ Years of Optic Experience Dedicated Service Department Based in California Monstrum Scope Ring Alignment and Lapping Tool Kit Ensure precision scope ring alignment down to the very last micrometer! The Monstrum Scope Ring Alignment and Lapping Tool is built for checking and adjusting for even alignment of your scope ring set. Place the two alignment rods into your mounted scope ring set to check for even alignment. If properly aligned, the tips of the two rods should be perfectly level. If the alignment is uneven, the single lapping rod can be used to grind down the imperfections until the two rings are in pinpoint alignment. Available in 1 inch diameter, 30 mm diameter, or in a kit containing both 1 inch and 30 mm. Monstrum Lapping Tool Kit - 1 inch Monstrum Lapping Tool Kit - 30 mm Monstrum Lapping Tool Kit - 1inch & 30 mm Combo Application: Scope Rings Scope Rings Scope Rings Size: 1 inch 30mm 1 inch & 30mm