I tried them on a half dozen arrows I followed the directions and did not do any extra gluing. At least one fletching on most of them came off after a few months of shooting. Another down side is that if one fletching gets ruined then the whole thing is toast. If you use a jig you can replace 1 fletching if needed. At the price they want for them I would just buy a good jig, fletchings, and glue. They would work good for emergencies if you HAD to fletch a few arrows in the backcountry or something like that.