Viper V-Factor Darts 90% Tungsten Soft Tip Darts Grooved Barrel 18 GramsTake your game from casual to pro with the Viper V Factor Soft Tip Darts, designed for use with either electronic dart boards or most sisal dart boards. These darts are packed with features starting with the barrel, fashioned from 90% Tungsten and 10% Nickel. Tungsten is a very dense metal, able to create slimmer darts with the same weight as lighter metals; this allows for tighter shot groupings without sacrificing control, increasing your scores.