Material: Durable Zinc Alloy Specifications: Silver,7*14mm-30 sets 10*20mm-25 sets 10*29mm-25 sets 7*40mm-25 sets Package Includes: The package has 100 sets silver cone spikes.3 pieces of tools  Boxed Application: The punk style silver cone spikes are suitable for shoes, leather, and any type of apparel item. The silver cone spikes are easy to install,you just need to tighten the screws and the cone spikes will become firm on the clothes/leather . These are very great accessories for your DIY crafts and can show your special taste and personality.