The shad-style of the Ecogear hard-body lure has the best quality components, it is designed to create a tight shimmy action and slow floating buoyancy in saltwater, that allows the angler to work the lure over a range of structures and depths of the water column, to attract and hook even the most timid of fish.
When cranked down, the Ecogear SX-48 should work at around 1.5 metres depth, and the 3.8 grams will give you that bit extra casting distance. The tight shimmy with a slight roll in the body is ideal for working shallow edges that drop-off into about 2 metres of water.
Try working the lure up against structure, or slow-rolling it beside moored boats. Another trick is to cast it up in the back of floating pontoons, and slowly twitch it down beside and underneath the pontoon.