The bulk of a zipper/zip consists of two rows of protruding teeth, which may be made to interdigitate, linking the rows, carrying from tens to hundreds of specially shaped metal or plastic teeth… The slider, operated by hand, moves along the rows of teeth. Inside the slider is a Y-shaped channel that meshes together or separates the opposing rows of teeth, depending on the direction of the slider’s movement.

And how are these metal zippers made for your jacket, your bag, or your jeans? This classic 1983 clip from Mister Rogers’ Neighborhood, The Zipper Factory, is an excellent addition to our collection of factory videos.

Next: How marbles are made, how bike chains are made, how grand pianos are made, how aluminum beverage cans are made, and many more ‘how things are made’ videos.

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