Small pieces makes big difference in our daily life, quality metal zipper works on many tailor sewing crafts --- jeans, leather jacket, bags, etc. Let's have fun for sewing.Proper Use of Zippers** In order to avoid the elements engaged incorrectly, please do not force the slider even if it doesn't move smoothly. And you can apply paraffin or wax on the front and back surfaces of the teeth to repair the zipper.** Forcibly close will only lead to breakage. Bring two sides of the chain close to each other then slide the zipper. But if you take too much in the bag it will damage the element and tape.** Enough space on the tape, the teeth of zipper is not allowed to sew too closed with fabric. Slowly move the slider and pull out the caught fabric if it do happen.** The slider was pull down completely, then holding the bottom part that the separable pin was fully inserted into, while slide the pull with the other hand.