Bohning Archery Pro Class JigsThe Pro Class Jig has a quick set magnetic clamp with large grips for easy operation. It fits all shaft sizes and features an adjustable offset on vanes or feathers up to 5. 5" (140mm) long. It is capable of 3 or 4 fletch (4 at 90). The Pro Class Jig is available in three configurations with a Straight Clamp, a Right Clamp, or a Left Clamp. Additional clamps available for purchase separately.