Features a computer chip board for the. lip, a silent weight transfer system using. soft tungsten, and Gamakatsu treble. hooks."We built the SPRO Little John crankbaits to run at depths of 3 to 5 feet. We used a computer chip board for the lip to create more feel and to be more durable. A silent weight transfer system using soft tungsten translates into incredibly long casts for a small crankbait, even in windy conditions. We used the world's sharpest trebles - Gamakatsu. I think the Spro "Little John" crankbaits are the best shallow running crankbaits, period."