In an interview with CNBC’s Jim Cramer, CEO Tim Cook described Apple’s commitment to bolster domestic manufacturing, suggesting the factories will bring more businesses to communities.

“We can’t be everywhere. I wish we could, but we are putting $600 billion to work in the next four years,” he said. “And so it is indeed an unusual commitment.And there’s 79 factories across the U.S. that will benefit from this.”

Cook told Cramer Apple’s factory buildout might encourage other corporations to build their own factories in these communities, creating a “domino effect.” He also said there will be “some surprises” for communities who do not yet know Apple will be bringing business to their areas.

Cook emphasized in the interview his company’s recent decision to invest $2.5 billion to expand its partnership with Corning and its glass factory in Kentucky. Apple plans to use the glass for iPhones and other devices.