Harrows Carbon 360 Shafts – Polycarbonate Dart Stems with Black Carbon Top that will rotate if hitting another dart. Each pack contains 3 Shafts. Harrows Carbon 360 Shafts – Polycarbonate Dart Stems with Carbon Top – GreenHarrows Carbon 360 Shafts – Polycarbonate Dart Stems with Black Carbon Top that will rotate if hitting another dart. Each pack contains 3 Shafts.Harrows Carbon 360 Shafts – Polycarbonate Dart Stems with Black Carbon Top that will rotate if hitting another dart. Each pack contains 3 Shafts.