Works on Open-End, Closed-End, and Invisible / Watertight Zippers. LARGE WORKS ON Zipper Sizes 8-10, Examples wetsuits, boat covers, canvas tents, heavy duty clothing, jeep windows. HOW TO CHOOSE SIZE: (See Video) Start by checking the back of your broken zipper slider; most zippers have a size number (1-10) embossed on the back of the slider.
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