The step up from 3oz, and the weight most surf anglers end up fishing on an average-to-rough day.
The pyramid's flat faces and sharp edges dig into sand and hold against the sweep, where a rounded sinker rolls down the beach and into your neighbor's line.
Fish the lightest weight that actually holds. Overweighting kills the natural movement of the baits on a pompano rig — but a rig that will not stay in the trough catches nothing at all.