ZAPPU D.N. Rubber : Ideal for difficult fishing conditions, the Zappu Cocho Cocho Head delivers a super-finessy presentation that will get the job done arounZappu has added a new twist to the nail sinker rig. Now when you want to add weight to your worm to fish the NEKO RIG, your nail weight has a skirt adding extra color, action & appeal. Available in different weight sizes and colors.d finicky fish and in cold waters. Made from 97% tungsten, the Zappu  Cocho Cocho Head provides a compact presentation that is smaller than lead counterparts of the same weight. Increasingly sensitive as well, the Zappu Cocho Cocho Head transmits faint changes in composition and the most tepid of bites. Retail cost is $6.50 for a pack of three.