3-Fin Jig Builder’s Set

This set of fin jigs is perfect for the hard-core rocketeer that builds a lot of rockets. Use them with the five most common sizes of tubes, with 3-fins. They position and hold all the fins to be added at the same time in order to speed assembly. Made from laser-cut cardboard, you get perfect alignment so your rocket flies straight as an arrow. For 13mm (BT-5), 18mm (BT-20), 24mm (BT-50), 33mm (BT-55) and 41.6mm (BT-60) size body tubes.