5shot says they work. blazers work also, but don't provide as much spin. if i remember correctly 5shot's review said you get more spin out of them than you can get with 4 inch hard helical feathers. i haven't had too much luck with someone else fletching my arrows on the con side. if its at a shop near you or a service you or nubo's had luck with who will replace any that fall off, great. if not, think about what happens if a few fall off. weird how when i fletch my own arrows none fall off.