The Gra-V-Bar system is the most advance heavy duty stabilization system which allows the archer to use the natural gravity, to gain superior stability and performance. AEP also designed a multi angle quick disconnect feature which also allows the archer to place on, remove off and put away the stabolizer bar with minimal time and effort. The index allows the archer to properly set a specific angle to your liking, ensuring it is consistent every time. Please make sure your bow is compatible with this product by reading the description below. If you are still unsure, please feel free to give us a call to better serve you.