Tree Spike Studs and Spikes Metalic Screw Back Rivets for Leathercraft Punk DIY 12mm (50PCS, Silver) Material: Zinc Alloy Metal (Lead And Nickel Free), Shape: Tree Spike, Screw Type: Phillips/ Slotted. Color: Silver Size - Height: 12mm Tree Spike Studs Are Suitable for All kind of art and leather Crafts And Clothes making Quantity: 50pcs/Pack Comes with HC'S Original Package.