Ideal for decorating your bags, belts, leather bracelets, shoes, boots, handbags, hats and more. Suitable for all kind of art and leather crafts and DIY clothes making.Material:copperThe height of the middle section (post), not including the flat heads is 4mm-20mm.When the post length is 5mm,the length of the screw thread is 6mm.When the post length is 5mm,the length of the screw length 3mm is post length = 3mm