Tungsten jigs simply can’t be beat when it comes to ice angling sensitivity. Heavier CPT Tungsten gets baits down to the fish faster, as well as helps keep the coil out of your line.
A straighter presentation translates into more felt bites, and a better hookup ratio. - (Harder than Lead) The harder tungsten jig transmits energy better, which lets you "feel" the structure better.
This in turn enables you to work the jig more effectively and feel underwater timber, or the transition from rock to sand bottom. And Tungsten shows up better on electronics than lead, helping you with a better bait presentation.