The VP-22 Throw Lever is made out of strong anodized aluminum with thicker, more rigid geometry. Both of these things provide better durability against drops or abuse unlike plastic or thinner aluminum options on the market. The common ball and socket joint is featured on one side of the lever giving the end-user the ability to slide the ring apart and install on scopes that have an illumination adjustment turret, or larger objective lenses. Simply separate and slide over the 30mm or 1 inch section of the scope tube and re-install the lever. Our throw levers are currently compatible with or without the protrusion on the ring. A list of known compatible scope models is below. We offer these in our usual black, blue, and red anodizing for color. - VORTEX OPTICS: STRIKE EAGLE 3-18x24, 4-24x50 VIPER PST GEN II (ALL SIZES) 1-6x24, 2-10x32, 3-15x44, 5-25x50 RAZOR AMG 6-24x50 AND OTHER 1.780"-1.825" diameter magnification rings Includes: -Throw Lever ring and lever -Hardware -L-Key. PLEASE CHECK DIAMETER WITH A CALIPERS IF YOUR SCOPE IS NOT SPECIFIED BY NAME TO VERIFY CORRECT SIZE.