That does look quite crudely done. Also, the toe of the anchor that is important for performance does not look very well made, but perhaps it is just an artifact from the photo
I cannot find any information about this anchor's ballast material. You could try a small magnet in the holes to see if it is lead or steel. If it is lead, the holes would be less of a concern, but I suspect it is steel. Unfortunately, even some of the expensive plow anchors use steel ballast. They often claim this is more environmentally friendly, but it makes the ballast chamber much larger than if they used more expensive lead.
The relatively inexpensive Delta
anchors use steel ballast, but the tip weight is cast so the tip is completely filled with steel, with no chance of water
penetration, or concerns about air pockets when re-galvanising. This construction also keeps the steel ballast as compact as possible. Other, even expensive, plow anchors use steel ballast. Sometimes with a cover plate welded over the top. I don't think this is an ideal solution.
An air space needs ventilation holes before it can be galvanised. Air spaces are not ideal for a ballast chamber that should be as small as possible to reduce the resistance to penitrating substrates such as weed.
The Maxset anchors I have seen seemed to be reasonably designed, with decent weight distribution, tip weight, and self righting ability. I have not seen this anchor's performance underwater.
If you really want a plow anchor, the Kobra
is worth considering. This is an inexpensive anchor, but has good performance and the solid cast ballast chamber removes the risk of water
penetration, with corrosion
of the steel ballast. The anchor can be re-galvanised without any concerns about potential air pockets. However, if you are anchoring
frequently the new generation concave anchors offer considerably higher performance. The rollbar anchors use the rollbar instead of large ballast chamber to orientate themselves into the correct setting position. The Spade anchor uses a lead ballast chamber. These are both high performance solutions.