Ensure that your darts stay in excellent condition with the Viper Tune Up Kit. This kit includes everything you need to keep your steel-tip darts sharp, secure, and durable. It includes replacement flights, shafts, and O-rings as well as a tip shaper and dart mechanic tool to make repairs as necessary. FEATURES: (12) replacement flights with flight protector Replacement aluminum and spinster shafts Keychain tip shaper Dart mechanic tool Set of O-rings to ensure shafts stay on 90-Day Limited Manufacturer's Warranty Style: 37-0163