Button Spike And Studs Metal Screw Back Spots For Leathercraft Rivets Bullet Leather Clothing Punk DIY Leather Craft 8x8MM (100Pcs, Bronze) Material: Zinc Alloy Metal Shape: Button Spike, Screw Type: Phillips/ Slotted. Color:Bronze Size - Height: 8mm, Base: 8mm. Cone Bullet Spike Studs Are Suitable for All kind of art and leather Crafts And Clothes making