About this item Sturdy Material: Zinc Alloy Studs with Iron Screws,Fine Workmanship and Sturdy Size and Color: Stud Height: 8mm (5/16″), Stud Round Head Diameter: 5mm (13/64″),Stud Base Diameter: 8mm (5/16″); Color: Bronze Package Contains: 100 Sets Bronze Button Studs with Screws; Coming with White Zip Bag Easy to Use: These are Pretty Sharp and You Will Love Them; Just Need Punch a Hole and Screw on; They Will Definitely Look Cool with Your DIY Project; Wonderful Products That You Can’t Missing Wide Range of Uses: Amazing Idea for Decorating Your Bags, Shoes, Belts, Jacket, Dog Collar, Garments, Clothing and more leather craft DIY making