Bitzenburger Clamps are precision ground to ensure identical blade matching. An integrated, graduated scale at the rear base of the clamp allows for equal, consistent spacing of vanes and feathers. Hollow recess provides a nonslip grip.Made in USA. Jig not included. Available:Straight Fletch, Left Helical, Right Helical.Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Fletching Jigs.