Inspection points can be visible objects or just invisible colliders, depending on what you need for your game - Use my test scene to get an idea of what they're like!
Here you can add a brief description in text form to display when you hover over an inspection point and also have an OnClick event when you select a point, you can see my example on the “Cardboard Box” in the test scene!
On the parent object, in this example the knife object select the “ExamineItemController” script and add the inspect points to the inspect point array at the bottom of the inspector! NOTE: This is very important!