1. Professional Scope Leveling Kit: This scope mounting kit includes 1 scope level for securing the clamp, 2 reference levels for placement on your rail or scope's open turret caps to enable precise adjustments, and 1 Allen key for adjusting the scope leveling kit. Everything needed for accurate scope leveling and alignment. 2. Higher Accuracy: The improved calibration distance of the scope leveling kit is 10mm, featuring a clear scale that allows for more accurate and effective bubble measurement, helping reduce alignment errors. All scope levels are thoroughly inspected before leaving the factory. 3. Adjustable & Magnetic: The scope level features adjustable knobs for easy attachment to equipment, fitting barrels up to 1.97 inches in diameter. The reference levels include strong magnetic bases for secure and stable positioning. 4. Aluminum & Protective Silicone: Constructed from durable aluminum alloy for long-lasting performance and a smooth finish. The interior includes a soft rubber padding that helps protect your equipment from scratches during use.