Stay in control with fast magnification adjustments. Compatible with Crossfire HD (except for Crossfire HD 1.5-5.5x32 Scout Scope) and Viper HD riflescopes. Product Specifications Length: 70mm Weight: .31 oz Product Features Compatible with magnification rings with a diameter of 44mm 6061 Aluminum - Durable and Lightweight Whats In The Box 44mm Throw Lever 2mm Screw 2mm Custom Tool