Viper Sinister steel tip darts are designed with high quality 95/5 tungsten slim barrels which allows for tighter shot groupings. A smooth, sleek barrel creates excellent gripping points, enhancing your control. Each dart features an aluminum shaft with a locking hole to increase tightness and improve stability. Viper Sinister darts include an additional 3 convex nylon shafts, a dart mechanic tool and 6 heavy duty 150 micron thick high speed flights. The flights are specifically designed to help increase speed and reduce drag, delivering a consistent flight path and pinpoint accuracy.