A traditionally designed boom which is still a popular boom for boat or uptide running leger rigs.
The triangular shape is designed to sit in the tide for improved presentation and bite detection and maximises your bait position depending on the flow of the tide. The triangular body makes it tough and rigid so that it will not bend in the water. This allows the wide body to provide resistance to the water and maximise the use of the tidal current when the tide run is light and so moving your rig and baited hook naturally with the water flow. Better presentation means more bites, and more fish.
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