Why do most zippers say 'YKK' on the pull-tab?
Published April 13, 2012
3 min
    Add to queue
    Copy URL
    Show notes
    Have you ever wondered why zippers often have the letters 'YKK' etched into them? Learn more about the Japanese company behind the tiny letters -- and the zippers -- in this episode.

    Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers
        0:00:00 / 0:00:00