Those are standard #6 Mustad hooks, nothing fancy. I have a single-box that I obtained from who knows where that has twenty six fixed compartments yet is only 10" long, 4" wide and 1.25" thick. Each hole has its own color combo of these jigs X 30. In a good fall I'll use most of these. When crappies begin to focus on these small minnows after they are forced shoreward by cold wind and falling water temps, the area the crappies work hard are in the rocks and I do mean right up in the rocks. That's where the minnows like to find shelter from predators. I lose a lot of jigs casting right to the rock and working the bait back out to open water but I need to allow the jig to drop into the depths while bumping off the rip-rap.
Rocks and docks hold heat from the earth and/or from daily doses of sunshine better than water. Marinas and backwater areas are secluded and water doesn't move like it does out in the open so where the rocks and docking structures come in contact with the water. Basically, the warmer water will be found where water meets terra firma in some fashion rather than in the open where wind and surface area help drop temps. Dock pilings serve the same purpose and to some extent, so do the floats that docks ride on. The shoals of these small minnows seek out the warmest water, but the prey fish know that too and follow them right into their little areas of sanctuary. Crappies feed aggressively on these minnows to the point that I have caught crappies with heads and mouth areas freely bleeding and covered with cuts and scrapes by standing on the rip-rap and just dabbling a jig in the rocks in front of me. I've stood there and watched this feeding frenzy happening. At times it can be nuts. And on docks the absolute best time to fish is when the first shale ice covers the open areas inside a marina but the cold isn't hard enough to freeze around the pilings and floats leaving 6" to 12" of open water. Just drop a jig down in the open water and you'll find out.
When wet these jigs are not big on action but they mimic the minnows perfectly and when the minnows are the prime forage..... well, Paul Harvey would call it the rest of the story.