plural vs locking pliers

plural and locking pliers both are nouns.

Word	Noun	Adjective	Verb	Adverb
plural	Yes	Yes	No	No
locking pliers	Yes	No	No	No

plural (noun)	locking pliers (noun)
the form of a word that is used to denote more than one	pliers that can be locked in place

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