I don't know. It could be

Sometimes, businesses import stuff without knowing exactly what they are for.
One time I was in a shop and started chatting with the owner (suggesting to him that the market has changed from what it was 20 years ago, and that he has to relocate his business to more customer-dense areas). Anyway, we chatted for long enough he started talking about business difficulties. He showed me something and said : see , I received a container from China and it contains this stuff, I don't even know what it is.

He was showing me a set of lock picks. LOL.
He never ordered then, and doesn't know what they are.

In that incident I was reluctant to tell what the stuff was. But there was another example when I took advantage of the business "mistake". It was a camping store with the usual stuff. In one corner, there were the white BBQ fire starting cubes, fire gel ..etc. However, there were other boxes of similar cubes that looked the same, with a little higher price. Everyone bought the cheaper ones and left these. Not only they were a bit more expensive, but they smelled bad. LOL.

Nobody knew what they were because they were Esbit cubes : no one around here uses Esbit, or other solid-fuel stoves. Most everyone uses propane or butane stove, or wood.

So (evil smile) I grabbed all the boxes for myself.
And sure enough, that shop never imported them again.

Back to the shovel/spade.
It seems they imported it with a 1000 others , and no one cared about the geometry, LOL. So, as soon as I get myself an anvil, I will flatten it and use it for cleaning around the garden.