Check the listing for details. 30PCS 40MM Spike and Studs Silver Cone Spikes Punk Bullet Large Leather. Condition: New. Listed at 10.96 USD. 30PCS 40MM Spike and Studs Silver Cone Spikes Punk Bullet Large Leather Rivets Screwback Studs Screw on Cone for DIY Craft Clothing MATERIAL: Zinc Alloy. SIZE: 7*40mm/0.27*1.53 inch. COLOR: Silver. Spike stud overall surface after polishing, the hand feels smooth and comfortable, and the lines are smooth and beautiful. One package includes 30 set long cone spikes. The bottom of tapered spikes adopts a pyramid design, which has a more three-dimensional feel. Metal spikes studs are perfect for art making, rock punk gothoc leather crafts and clothes making, such as shoes, spiked collar, belts, handbags, jackets, leather bracelets, shoulder pad, helmet etc. It fully shows your special taste and personality, highlights your personal charm.