Check the listing for details. 30set Flat Head Stud Spike 12mm Purse Feet Nail Stud Buckle Rivets Tool, Silver. Condition: New. Listed at 17.71 USD. Size: 12 x 7mm / 0.47" x 0.28";Color: Silver ToneMaterial: Zinc AlloySurface Treatment: PlatingThread Specifications: M3 x 7 x 7mm / 0.12" x 0.28" x 0.28";Package Content: 30set Bucket Flat Head Stud Rivets (30pcs Flat Head Rivets + 30pcs Screws)These screw back rivets are made of zinc alloy rivets with iron screws. Each elbow nail has a smooth surface, and the zinc alloy is resistant to oxidation and corrosion and is not easy to fade and wear, extending the service life of the rivets.Our flat head stud purse feet spike adopt excellent workmanship, no casting lines, and deepened thread design. They are fine in workmanship and strong and durable. The surface treatment uses electroplating to improve the gloss of the metal rivets and enhance their wear resistance.