Xtreme Rd 21 Grams Style 1 Blackline, 80% Tungsten Darts, Powered By Balancepoint ACE Points Clearance Specials - Limited Quantities Moveable Point Darts manufactured from 80% Tungsten Alloy They are fitted with Balancepoint ACE Points which we believe are the best system in the world Knurled grip for positive 'Finger Feel'. The darts are packaged in small dart case with small-wearing aluminum shafts, double thickness flights, and O'rings. Neutrally balance means that there are no unusual in-flight movements.