Viper Grim Reaper 80% Tungsten Soft Tip Darts Black Rings (16 grams)Your opponents will sense a feeling of dread wash over them when you come to shoot with the Viper Grim Reaper 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 80% Tungsten and 20% 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