Features four prongs that will pick up traces of lakebed debris, weed and natural food items to enable you to establish exactly what you are fishing over
Weight forward design enables them to be cast a long way
Dumpy nose ensures more of the lead is in contact with the lakebed so more vibrations are transmitted up the braided line to the marker rod tip
Once you have identified a likely-looking spot with a normal lead simply swap to this design for a more thorough investigation