QUALITY MATERIALThese chicago screws are made of high quality carbon steel, uniform coating, high hardness and with beautiful appearance, round and smooth, sturdy and durable, to give good luster. High hardness durable and non-rusting, not easy to rust in moisture environment, antioxidant.COMPLETE MODELSWe offer phillips chicago screw binding srews posts assortment kit and one specific size you need. Enough quantity and quality, a variety of specifications binder screws with complete thread, not easy to strip.SIMPLE INSTALLATIONDelicately designed Philip head, standard slotted head, easy installation with screwdriver. Smooth without burr, beautiful and practical, the cross section is smooth and burr - freeWIDE APPLICATIONVarious sizes give you a range of applications for different jobs as they come up. Suitable for some simple DIY projects with leather, all kinds of leathercrafts, such as belt, handbag, shoes, clothes, leather bracelet. Suitable for Scrapbook Photo Albums Binding and Leather Saddles Purses Belt [QUALITY AFTER-SALE SERVICE]: If you do not satisfy with our products or any questions, please come to us anytime. 12 hours quick response service. We promise to offer a satisfactory solution to all your problems.