Designed to fit Easton X10 and X10 Protour shafts. Break off design for improved tuning options. Tungsten offers improved durability preventing bending in the shaft for increased arrow life . Grain Weight:100, 140 grains Material: 97% Tungsten, 1.5% nickel and 1.5% copper Profile: Bullet Compatibility: for all Easton X10 and X10 Protour Shafts Colour: TrueSilver