Accurate adjustments made at extreme distances require that riflescopes and platforms be exactly level before taking a shot, and the Warne Mfg. Universal Scope level is an easy add-on for any precision shooter that enables them to verify the vertical alignment of their optic and rifle. The level clamps onto the main-body tube of the scope, and levels are available for the following tube sizes: 1-inch, 30mm, 34mm and 35mm. Each level features a matte-black finish. Mfg: Warne Mfg. Company