About this item Sturdy Material: Zinc Alloy Studs with Iron Screws,Fine Workmanship and Sturdy Size and Color: Stud Height: 8 mm (5/16″), Stud Round Head Diameter: 5 mm (13/64″), Stud Base Diameter: 8 mm (5/16″); Color: Mixed of Silver, Gold, Bronze and Gun Metal Package Contains: 100 Sets Mixed Color Button Studs with Screws, 25 Sets from Each Color (4 Colors); 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