What is the use of "multiplier" in "setvein" command?

[wolfieboy09]

For example, if you do 100, every time the drill mines, you get 1 item. If doing 50, you get a 50% chance of the item.

Doing 200 would give you two of the item every time

[tom5454]

The amount of items you can extract from the vein, if it is non-infinite.