The Eurotackle ESR Nano Tungsten Jig Head claims to be the first ice fishing tungsten jig designed for enhanced visibility on live imaging sonar and traditional flashers. ESR (Enhanced Sonar Return) Eurotackle Nano Tungsten Jigs offer inclined flat surfaces on the top and front for optimized sonar waves to return bright and precise images to transducers.ESR Jig Heads' hydrodynamic shape drops fast with an outstanding balance in the water column to reach your targets and produces a micro-darting action. Relying on a 90-degree Mustad hook, the 1/32 oz. and 1/16 oz. size Eurotackle jig heads are innovative lures for advanced hard water fishermen and panfish anglers. If you depend on your live imaging technology, ESR Nano Tungsten Jig Heads are the right choice!Tungsten jigs designed specifically to be more visible in live imaging technology and traditional flashersHigh-quality micro finesse option for advanced hard water fishermen and panfish anglersHydrodynamic shape reaches targets quickly and offers great balance and micro darting action90-degree Mustad hook2 sizes:3.5mm (1/32 oz., #12 hook)5mm (1/16 oz., #10 hook)Quantity per pack: 2