For those unfamiliar with Zamac Buttons (also known as Zamak), they are buttons made with a base metal of zinc and combined with other alloying elements such as aluminum, magnesium, and copper. These particular metal buttons are strong and contain the look of class as well as sophistication flawlessly. Topped with black and backed by a silver shank, this grouping of zamac buttons would be great for suits and blazers. Carried in sizes 15mm, 20mm, 23mm, and 28mm.