MIRAGEDRive Spare parts kits Spare parts kits include a fin, mast, sprocket, chain and appropriate parts for the drive version. Older drives have sprockets and masts that use a set screw connection. V2 drives use threaded sprockets and masts. All in a handy zippered pouch. Don't waste a day on the water when your MirageDrive could be easily repaired. Available for the standard fin drive or a drive with the ST Turbo fins. Standard kit shown.