DescriptionCarbon steel screw posts are the most kind of binding post. These are also commonly referred to as Chicago Screws. These screw posts are great for holding together groups of paper, cards, swatches, photo albums, point of purchase displays, menus, scrapbooking, etc.Features- Color: Golden.- Material: Carbon Steel. - Size: 3.20X0.90X0.90 cm/ 1.26X0.35X0.35 inch.- Size: 2.10X0.90X0.90 cm/ 0.82X0.35X0.35 inch. - These Chicago screws are made of carbon steel, uniform coating, high hardness, sturdy and durable, to give good luster.- High hardness durable and non-rusting, not easy to rust in moisture environment, antioxidant. - Smooth without burr, beautiful and practical, the cross section is smooth and burr-free. - Various sizes give you a range of applications for different jobs as they come up.- Suitable for scrapbook, photo albums binding and leather saddles, purses and belt.