The UV Scope Rod by UltraView is made to attach the UV3 or UV3XL to your existing sight frame. This rod comes with a ½” mounting bolt, no extra hardware is required. Included is an integrated tool that allows you to adjust the set screws on the side of your scope. See the chart under manufacturer downloads to get the correct size for your sight. Features: Allows you to mount your UV3 or UV3XL to your sight Includes all mounting hardware Includes an integrated tool that allows you to adjust the setscrews on the side of the UV3 or UV3XL Multiple Sizes Available, check the manufacturer's chart for compatibility