Here are 10 packs of SANHU BAIT SQUID RIGS - bait catching rigs. Those multi-hook jigging rigs are used for catching mackerel, small jacks (caballitos), herring, smelt and other small baitfish. Rigs vary in length depending on number of hooks, but generally, 10 inches of mail lines stretches between 4-inch drop lines. Swivels attach at each end of rig.