The WCD Dope Snake was created to offer a universal and simple way to attach a DOPE or Data card to your rifle. A small board with Velcro hook is attached to a 12” rubberized flexible gear tie that simply wraps around the main tube of your scope. The provided DOPE card has Velcro loop on the back and attaches to the board. Adjust the angle and you’re ready to go. It’s not fancy, but it works !!!