Maximize the efficiency of magnification transitions with fluid precision using our throw lever. Constructed of skeletonized, lightweight, tough, hard-coat anodized machined aluminum. Compatible with all configurations of Viper PST GEN II riflescopes. Compatible with all configurations of Razor HD AMG riflescopes. Compatible with select riflescope magnification rings with a diameter of 1.81 inches / 46 mm. Compatible with Diamondback Tactical 4-16x44 FFP & 6-24x50 FFP Vortex Optics Vortex SV-5 Throw Lever SV-5