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 kit components. Everything needed for accurate scope leveling. 2. Higher Accuracy: The improved calibration scale is set at 10mm with clear markings, allowing for more precise bubble measurement and enhanced effectiveness during setup, helping reduce alignment errors. Each level is inspected prior to shipment. 3. Adjustable & Magnetic: Equipped with adjustable knobs, the scope level can be securely attached to devices with diameters up to 1.97 inches. The reference levels feature strong magnetic bases for stable and reliable positioning on metal surfaces. 4. Aluminum & Protective Silicone: Constructed from durable aluminum alloy for long-lasting performance and a smooth finish. The interior includes soft rubber padding to help protect your equipment from scratches during use.