plural vs rib joint pliers

plural and rib joint pliers both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
rib joint pliers	Yes	No	No	No

plural (noun)	rib joint pliers (noun)
the form of a word that is used to denote more than one	a type of pliers, the pivot of which may be moved to expand its gripping range

plural (adjective)	rib joint pliers (adjective)
grammatical number category referring to two or more items or units
composed of more than one member, set, or kind