Viper Sidewinder 80% Tungsten Steel Tip Darts Designed for use with sisal dartboards. Each barrel features deep grooves, knurled bands, or shark fins. Shafts feature locking holes for a more secure fit to the barrel. Set includes 3 darts, 6 flights, 3 extra nylon shafts, and a dart mechanic repair tool. Limited lifetime manufacturer's warranty on the barrel. Barrel: 80% tungsten, 20% nickel. Shaft: Aluminum. Tip: Steel. Flight: Wide glide with sidewinder graphics. Dart Weight: 21 g, 23 g, or 25 g. Model: 23-1801-21. Made in China.