These spikes, cone or tree shaped, from StudsAndSpikes are made of basic material, usually brass, steel, or aluminum. (With castings, alloy is used.)The plating and color (Nickel, roll coat Red/Black, gold) is made to be durable. Great way to make your DIY projects such as your old denim jacket or your leather belt. Why not make your own punk designed jacket, bracelet or goth clothes?