Unicorn Gripper 4 Dart Shafts. Moulded Shafts with Ring Compression for Security. Polycarbonate for Grip and Durability. Length:47.0mm; (does not include thread – 5mm) Unicorn Gripper 4 Dart Shafts – ClearUnicorn Gripper 4 Dart Shafts. Moulded Shafts with Ring Compression for Security. Polycarbonate for Grip and Durability. Length:41.0mm; (does not include thread – 5mm)Unicorn Gripper 4 Dart Shafts. Moulded Shafts with Ring Compression for Security. Polycarbonate for Grip and Durability. Length:35.0mm; (does not include thread – 5mm)Unicorn Gripper 4 Dart Shafts. Moulded Shafts with Ring Compression for Security. Polycarbonate for Grip and Durability. Length:29.0mm; (does not include thread – 5mm)