▼ The object “them” is implied in the context.

▼ עוֹד (’od), an adverb meaning “yet, still,” can be inflected with suffixes and used as a predicator of existence, with the nuance “to still be, yet be” (T. O. Lambdin, Introduction to Biblical Hebrew, 171–72, #137). Then, it is joined here with the Hiphil participle מַחֲזִיק (makhaziq) to form the sentence “you are still holding them.”