Okones Pack of 30,1/3''Diameter1/4''Tall,Solid Brass Nail Rivets Chicago Screws Studs Spike Screwback spot for Leather Craft Belt Wallet (1/3''Diameter1/4Height) 1/3''(8mm)Diameter,1/6''(4mm)Tall They are great for any custom leather work. Package: 1 pack of 30pcs Suitable for decoration on your DIY bags, belts,handbags, leather bracelets, shoes, Hats etc. Brass is not hard enough,It is not necessary to over-tighten