Edge protector.
Edge protector. A device placed on the exposed edge of an article to distribute tiedown forces over a larger area of cargo than the tiedown itself, to protect the tie-down and/or cargo from damage, and to allow the tiedown to slide freely when being tensioned.
Source
49 CFR § 393.5
Scoping language
As used in this part, the following words and terms are construed to mean: