YKK #3 nylon coil non-separating, closed-end zippers are ideal for use on pants, skirts, dresses, purses, and handbags. You'll also find them used on luggage, sporting goods, pillows, and duvet covers. They make quick work for a purse or change purse, too. Features a tooth size of 3 (4.1mm), tooth color matches zipper, 3/4" top/bottom extension and the one-way slider has an automatic lock. These closed-bottom zippers are non-separating, like those used along the side of a skirt or back of a dress. They do not separate like a jacket zipper.