The only fletching jig with a helical designed for 2'' vanes. Gives you the perfect helical for Blazer® vanes or any 2'' vane. Increase accuracy and arrow flight. Jig has pre-set 3° helical built into the clamp. Designed for standard carbon arrow shaft diameters (from 17/64 to 23/64). Places three vanes 120° apart. Easy setup and operation.