Harrows Supergrip Fusion Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 35mm; (does not include thread – 5mm) Thread: 2baHarrows Supergrip Fusion Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 45mm; (does not include thread – 5mm) Thread: 2ba Harrows Supergrip Fusion X Shafts – Dart Stems – ClearHarrows Supergrip Fusion Shafts – Strong Polycarbonate Shafts. Includes machined rings. Length: 40mm; (does not include thread – 5mm) Thread: 2ba