What is a Two-Way Zipper and What is its Purpose?

Double sliders for zipper: A guide to YKK zippers

Heavy Duty Zippers #10 - Black — Northwest Tarp & Canvas

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YKK VISLON® molded plastic pre-assembled zipper with matching slider that features a two-way separating zipper end. For use in repair, manufacturing

#10 Vislon, Black, 30 YKK Separating Two-Way Jacket Zipper, Plastic, #10VTW-30-BLK

Zipper Guide – Pattern Adventure

How to Wash Charles River Apparel Rain Jackets - 4 Easy Steps

#10 molded plastic 2-way separating zippers feature teeth that measure approximately 10mm (1/2 inch) wide when zipped. Often called sport zippers or

#10 Molded Plastic Heavy Duty Two-Way Separating (Jacket) Zipper

Two Way Zip – Universal Works

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How to make two-way zipper into a one way-zipper. Metal hardware. : r/howto