Specifications:Product Name: Solid Brass Studs with ScrewsColor: SilverMaterial of Head: Solid BrassMaterial of Screw: Solid IronHead Size: 6mm(15/64 Inch), base: 7mm(9/32Inch), height: 8mm(5/16 Inch), post diameter 4.2mmInstalling Steps:1.Check the package what you received.(If there some missing parts, please let us know immediately)2.Find the point where you want to punch and sign it.3.Put a hardboard under your bag or purse as a support, knock with a hammer directly, the hole will be punched vertically.4.Use the screw through the holes.5.Tighten the round head with the screws.6.Perfect done!Package Content:30 x Silver Slotted Chicago Rivets30 x ScrewsNote:1. Light shooting and different displays may cause the color of the items in the picture to be slightly different from the real object2. Beware of small parts of children from swallowing.