These darts are manufactured from premium 90% Tungsten alloy. This means that they are slimmer than many darts of this weight. The thinner barrel means that you can stack the darts closer together on the board. This improves your chances of hitting those magical three triple twenties. The barrels have a very Aggressive Knurled grip to help you to feel the dart in your fingers and also prevent the dart from slipping as it is released from the fingers. The darts are neutrally balanced which means that there are no unusual in-flight movements as the dart heads towards the board. The ACE Moveable Point System. Why are these points so special? 1. Free-Floating Frictionless Movement 2. There are no internal collars or tabs to wear out or interfere with the movement of the point 3. There is no locking taper which will hold the point and prevent free movement 4. The system is self setting 5. The free flowing kinetic forward movement will spin the point of the dart around the wire 6. The free flowing kinetic forward movement will spin the point of the dart around the wire 7. No recoil of the dart once it hits the board. All forward movement of the dart is concentrated on driving the point into the board and breaking the tension between a collar or a taper 8. No rattles or other unsettling movements in the point. We believe that these points are far superior to any other moveable point manufactured. Fewer bounce-outs means more winning games for you. 0% Tungsten 25g No-Bounce darts with Agressive Knurled Grip - Powered by Balancepoint ACE Points. These points are now accepted as the premium moveable point system and will reduce bounce-outs. The 90% Tungsten barrel allows for tighter grouping on the board and improves your ability to score that maximum 180. The knurled (rough) barrel will help to prevent the darts from slipping as they are released from the fingers.Also includes an upgrade kit with 5 sets of 100 Micron Xtreme flights, a dart tool and a point sharpener..