Viper Contoured Grip 21 Grams, No-Bounce, Moveable Point Darts, Tungsten Darts Moveable Point Darts manufactured from 80% Tungsten Alloy They are fitted with licensed moveable points Contoured grip prevents slipping when the dart is released from the fingers. If you have problems with 'Finger Feel' these darts will help you to hold the darts and achieve a consistent throwing action. Neutrally balanced to prevent unusual flight patterns once the dart is released. The darts are packaged in a small dart case with hard-wearing aluminum shafts, double thickness flights, and O'rings. Moveable points mean fewer bounce-outs on worn or dry boards.