Silver reflects hard and reads as a scaled baitfish — sardines, threadfins, cigar minnows — which is what nearly everything on the reef is eating.
The narrow Hydro body carries less water resistance than a wide fluttering jig, so it cuts current and reaches bottom fast. On a drift over a Gulf ledge that speed is the difference between fishing your number and fishing past it.
110g is the standard offshore weight. Assist hooks top and bottom.