Fire 90% tungsten darts are manufactured using a unique production process. Highest grade, super fine tungsten powder is blended with nickel, iron and zinc, compressed and then sintered at over 3150ºC. The resulting billets are then precision machined into radical barrel profiles. Every barrel is subjected to a double exposure Vapour Deposition Process, which creates an ultra durable, non-slip coating. The final process is the laser marking of Harrows unique flame design. Supplied complete with Harrows Supergrip Stems, Fire Flights, and a hard case.