Crimson TraceA(R) Riflescope Throw Levers are extremely lightweight with a durable one-piece design. Built to fit Crimson Trace scopes with a firm lockup around the magnification ring, they provide fast and accurate manipulation of the scope's magnification for ease of engagement at different ranges. Fits CTL-5318 Riflescopes Custom designed for Crimson Trace Optics Low profile design minimizes snag hazard