(CNN) President Donald Trump announced the "saga" between his administration and 3M has ended with the finalization of a deal that will see the manufacturer supplying millions of masks for health care workers.

Trump announced at the coronavirus task force briefing that the White House had "reached an agreement, very amicable, with 3M for the delivery of an additional 55.5 million high-quality face masks each month."

In total, Trump said 3M would produce 166.5 million masks -- nearly all N95s.

"Mostly that's going to be for our front line health care workers," he said.

A senior administration official said the government's decision to use the Defense Production Act was key to shifting the trajectory of negotiations between the two sides.

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