Harrows Supergrip Ignite Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 45mm; (does not include thread – 5mm) Thread: 2ba Harrows Supergrip Ignite Shafts – Dart Stems – ClearHarrows Supergrip Ignite Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 45mm; (does not include thread – 5mm) Thread: 2baHarrows Supergrip Ignite Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 45mm; (does not include thread – 5mm) Thread: 2ba