Viper Spinster Dart Shafts – Rotating Top – Blue – Medium. Uniquely styled aluminium shafts available in 2 lengths and 4 colours. Features a rotating top to deflect oncoming darts to minimise dart impact when grouping closly together. Replacement tops available separately. Each pack contains 3 shafts.Viper Spinster Dart Shafts – Rotating Top – Blue – Short. Uniquely styled aluminium shafts available in 2 lengths and 4 colours. Features a rotating top to deflect oncoming darts to minimise dart impact when grouping closly together. Replacement tops available separately. Each pack contains 3 shafts.