Maximize the efficiency of magnification transitions with fluid precision using Vortex's SV-2 Switchview Throw Lever. The Switchview attaches and detaches easily to the magnification ring. Constructed of skeletonized, lightweight hard-anodized aluminum, the SV-2 is one tough accessory.Compatible with select riflescope magnification rings with a diameter of 1.739 inches / 44 mm: Razor HD riflescopes with a rubber magnification ring Viper riflescopes with a metal magnification ring: >> PST models >> HS-T models >> HS LR models >> HS models Viper XBR crossbow scope Strike Eagle 1-8x24 riflescope