Fit Shaft Gear - Slim Spinning #2 Short (18mm) Innovative flight and shaft system The "push in" system provides easy insertion of flight into the shaft These one piece spinning shafts will allow your Fit Flights to spin out of the way of incoming darts The fit flight system prevents "Robin Hooding" which will lead to increased scoring These slim shafts will have a similar feel to the traditional alluminum shafts but they will last much longer