Harrows Assassin 80% Steel Tip Tungsten Heavy Darts. The Assassin 80% Heavy range offers a fully comprehensive selection of styles and weights, which combine to form a series of radical and highly popular patterns. Features: Tungsten Barrels, Alamo shafts, Assassin flights, Slimline Case. Harrows Assassin Darts – Steel Tip – Heavy – Ringed – 27g