Those don't appear to be lathe tools ...
In fact, I don't think they are even woodworking tools ....
I work at Goodyear, at this time, and those closely resemble a type of tool used by us in trimming excess rubber flash off of tires ...
We put the tire on a round rotating table and spin it, and use a tool made much like those to remove the rubber that sticks out where it was squeezed out by the high pressure curing mold. The rubber goes into the opening and is cut away by the sharp "V" groove in the tool ... much safer to use that an open blade, but we still wear cut resistant gloves for safety.