Designed for standard carbon shaft diameters, the Blazer helix Jig will give you the perfect helical for the Blazer or any other 2" vane. This fletching jig is amazingly easy to operate and fletches all three fletchings at the same time, making it much faster than other jigs. Pre-set 3 degree helix clamp aligns shaft automatically. Sets vanes exactly 120º apart. Clamp design prevents adhesive build-up. Designed for 19/64" diameter shafts. Includes easy-to-understand, fully-illustrated instruction manual.